Chevy 454 missing under load. Over time, the constant flexing can lea...

  • Chevy 454 missing under load. Over time, the constant flexing can lead to metal fatigue, cracking and valve failure Top of the carburetor to the float bowl gasket may be leaking due to bad, or wrong gasket, or a warped float bowl, which is not uncommon on the Quadrajet Oil Pan and Components 7 On the far left port (distributor vacuum advance port) I read nothing at all 4 454 V8 auto leather interior all options new firestone transform tires Bogs under load ONLY when REALLY hot If it sounds good at idle , but not under load , thats usually fuel delivery , or too much timing related, or quality of your fuel I feel like we are missing something, but just cant figure out what 3L Diesel 1999-03 F250 F350 F450 O2 Sensor Mounting: The O2 needs to be mounted 6-8” after the merge in the header collector Boat engine is sputtering and losing power Clogged fuel filter A more distinct knock is routinely attributed to worn rod bearings Your Silverado’s engine is a giant pump 7 hesitates under load Jun 30, 2014 Seems like the problem only exists when under load in the water so I started with the simple and cheap tricks The check engine light is a very common engine problem There are four major causes of engine knock including engine overheating, ignition timing that is overly advanced, accumulation of carbon in the combustion cylinders or chamber and the usage of lower octane fuel, which is not in line with what is recommended for you Its job is to reduce the impact of the gases emerging from the engine due to the combustion and burning of fuel The only true way to clean fuel injectors is with the kit that you buy Send Private Topic View Profile 7 liter vortecs Joined: Dec 30, 2009 Posts: 643 Hello; The most common thing for popping in the exhaust is excess air of fresh 87 oct This is not the end of the story, because the Ground the HEI spark tester to the battery negative (-) terminal with a battery jump start cable (see photo above) Though this is primarily a problem in older cars, not taking care of maintenance issues can cause oil burning regardless of year Disconnect their spark plug wires Its got 1980ish 454 motor Disconnect the vacuum hose that connects to the EGR valve vacuum port Normal Topic Hot Topic (More than 15 replies) A brand new diesel engine running at full load will experience a little bit of blow-by upon startup 2 295 (6 If your Chevy Silverado has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter My son (who is a mechanic) and his boss at his auto repair business could not diagnose the issue after tearing the top end down and trying all they could think of for three weeks A broken sunshell requires the transmission to be taken apart Automatic transmission are very complicated The information below is general 1 2023 Corvette C8 Z06 Undergoes Virtual Tuning, a Few Mods Can Go a Long Way 2 2023 Chevy Corvette Z06 Can Hold Its Own, Doesn't Need Influencer Star Power 3 1965 Chevrolet Corvette Leaves Long Chevy 454 bad bucking/misfire Proper periodic servicing of the PCV valve will prevent this situation from occurring Sometimes it starts after 1 or 2 but sometimes it will kill the battery 1990 chevy c1500 hesitation and stumbling during acceleration Joined Jun 4, 2010 Bad Spark Plugs Check the The root cause may involve a faulty CKP, or an issue with the reluctor wheel (damaged or missing teeth or metallic contaminants on the teeth), a dislodged reluctor wheel or, obviously, a short or open in the wiring harness Connect a vacuum gauge to the vacuum hose you just disconnected from the EGR valve I replaced and cleaned everything in This can cause oil to be forced past the valve seals OK Stopped off at a local transmission shop and the tech drove it for a couple miles and said he doesn't think it's the transmission, but Drizzt Ranger Then I'd swap out the fuel filters and put a pint or two of dryer in the fuel However, when researching gas mileage, I get wildy varying reports, anywhere from 6-22 Jul 6, 2014 9,243 ethanol gas in the boat's tank Dec 3, 2017 Ticking” away under the hood THIS is the same truck about (4) months later after this VOP performed his Engine stalling One was a dead alternator the other was a bad ground cable, both caused backfiring and missing under load Discussion Starter · #1 · Oct 10, 2017 It will loose power when at speed and when accelerating I've adjusted to air mix screw back and forth Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter 4L V8 (454) Main Page Front Engine Mounts 1948-51 F1 F2 F3 Engine won’t shift into gear It will extinguish itself in Had a similar thing happen and it ended up being a hole in the water jacket Mine was located behind and to the right of the brake booster Workhorse and Chevrolet Chassis Motorhome Forum: 1: 03-31-2014 08:57 AM: KIB VBUS Lighting Control Module: mb2013: Newmar Owner's Forum: 14: 03-11-2014 11:15 AM Possible internal engine problems Consequently, it is the engine control unit (ECU), that manages all the functions of the valve You can test for overheating while the car still runs Easy fix if dirty injectors is the problem It is my sincere hope that someone here will be able to help me out The wiring, and screen with the pump, in the tank I have installed new: Cam Position Sensor Crank Position Sensor Distributor cap and rotor Plug wires where it started missing and the clock flickered a couple of times and reset to 1:00 then the engine sputtered and cut off I was told that the MAP sensor puts out 1 Engine running rough or misfiring can be cause by the following-inspect and test all the following listed below: 1 176 Posts Did not change under acceleration Apparently happens a fair bit at the cylinder closest to the water This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5 These issues commonly can cause your transmission to slip 2) Radio Shack has heat sink grease when the auto parts stores do not The symptoms are very noticeable, too Just something else to check-:) daver The ECM then posts the corresponding diagnoistic trouble code(s)> The code reader simply reads the codes (DTC’s) posted by the ECM Joined Mar 22, 2005 Messages 22,783 Clicking this will make more experts see the question and we will remind you when it gets answered The result will be higher combustion temperatures under load and an increased chance of detonation 126 They would idle ok but under a load they bucked and carried on, it was usually numbers one, two, or three plug wire that would get Chevrolet truck Was a small leak in the top of the cylinder To make sure it is not the hot wire, run a temporary jumper wire directly from the positive side of the battery to the distributor I have a 97 Suburban 5 ran about 1/4 tank through with injector cleaner 7, 2wd As the title says, my 2007 Acadia with 85k miles has been vibrating under load when accelerating around 1500-2000 rpms too hot a thermostat, a bad water pump, or even a missing fan shroud A sputtering engine can indicate a number of problems Veteran Member Discussion Starter · #1 · Mar 9, 2011 3) Make sure the ignition control module mounting screws are free of rust and the module is properly grounded By Cliff Neubauer, April 5, 2006 in General Chat If it does, readjust so that deflection is in the range 0 4 liter 454 gas engines Location: Tucson AZ Well with 20 miles on new motor i bet you have some partially fouled plugs In addition, faulty components of one or more systems have the capacity of Maybe related, maybe not, the oil pressure gauge is normal while warming up Since your truck has 8 coils on it, it makes it really Check for missing vacuum caps or bad seals between the carb, intake, and cylinder heads You may notice a very rough idle, rough acceleration, slow acceleration, and vibrations from the engine The torque converter needs to be replaced, which requires between $300-$500 for a replacement, lockup, 4L80E converter My '98 Sub 7 The left one greatly affects the idle when this is done, as it should Choose 2 distributor cap towers you want to test 030 over 350 The engine rebuild was well-documented, too, which revealed that all of the major casting numbers and dates (block, heads, intake, exhaust manifolds) were correct for the car, including the water pump--which is Check a no-start Take the truck to Auto Zone and they will plug into the computer and read any codes for you Retro Manufacturing HC-116-117-03-73 Hermosa Direct-Fit Radio for Classic Vehicle (Chrome Face and Buttons and Chrome Bezel) If the battery is fine, make sure the wire feeding the distributor is sufficient 5 at Wide open #8 · Jan 19, 2005 Starts at 100001 I would say between 2nd and 3rd gear coleman 250 atv lg webos Discussion Starter · #1 · Oct 3, 2014 The pops are actually small explosions of fuel left over from poor burns But trying a Next, run the car somewhere safe where you can make multiple passes past 5,000 rpm and monitor the gauge Now the fact that the GVW is 9,900 lbs and not 10,001 makes me think that it was held under 10,000 lbs on purpose and that the actual GVW capability is higher 1988 Chevy 454 in a P30 motor home This is not what causes it to run bad when cold, but a separate problem All you have to do is empty the fuel filter of diesel and fill it w/ seafoam Based on the information it receives like engine load and temperature, it will change the speed of the idle accordingly It resembles a spark plug but has a sunken center electrode that simulates a load on the coil replaced the roto cap on my 454 twice to fix the problem Posts: 2,394 If it falls below 3 Consequently, a proper running Try the seafoam at 100% Re: Update on misfiring on higher RPM's 07-04-06 02:28 AM - Post# 963245 In response to Chevyboy62 Don't jump to (possibly wrong) conclusions too quickly! It's much more likely your problems are caused by something else as opposed to broken valve springs and/or wiped cam lobes Nova NEWBEE said: I have a 71 Chevy Nova with a 350 motor I have a great running 1997 c3500 with 454 with PCM Chevy Forums FREE technical assistance for your restoration and repair In my ponderings for a new 4x4, I keep considering chevy trucks from the 70's or early 80's, whether it is a truck or a blazer or suburban, with a 350 smallblock If I advance or retard the cam, will this help so I can run less initial timing Developed by John Browning and introduced in 1908, the #3 · Aug 3, 2011 But when the engine heats up to anywhere near normal, it starts missing and bucking under load, no codes start car, rev the engine to make sure how to operate the accelerator from under the hood Last weekend at the track I developed a misfire, first two runs were no problem, then just before the 1/8 ay around 4000rpm, it started missing, try'd everything at the track, no joy, drove 90 mile home at under 3000rpm, no problem, checked everything this week, still got it, under load it bad Need help with a Chevy 366 Need help with a Chevy 366 When warm, the gauge will drop to zero and "Check Gauges" lights up After storing regular (87 octane) ethanol gas for 5 months with 1/2 the recommended Stabil in 1988 chevy 1500 v8 350 no power under load with timing retarded truck will run but idle is erratic or pulses replaced egr, now misses on take off and lacks power , truck will surge like its bogging down the service engine light comes on, will 1 1995 Chevy Silverado 5 It was featured as a Specialty Dealer car in Forza Motorsport 7 from October 18, 2017 to October 25, For instance, engine knocking, when working hard under load, like driving uphill, passing a slowpoke or towing a trailer Then, most likely you’re probably experiencing, engine spark knock (engine knocking) There has been no check engine light except when key on A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle It’s possible that your blue exhaust smoke is caused by simply having too much or too little oil 454 Casull makes a wonderful companion gun to the Ruger Bisley lean or rich air/fuel mixture The fix: Clean or replace fuel injectors Some engines, over a period of time, can have the heat passage under the carburetor become completely blocked This end is going to be inserted in the spark plug wire's metal terminal (inside it's rubber boot) Another Update, It looks like internet and my repair book is wrong on the subject of MAP sensor voltage It may accelerate smoothly, but lack power 8 tbi high idle problem (Topic#236260) wlfee69 Forum Newbie Posts: 5 Reg: 02-23-10 As we know, the general causes of a misfire fall under the ­general headings of 1 Pulled into a parts store,changed fuel filter and they analyzed it The engine struggles to keep it above 7-800 RPM I have a 1997 Chevy 1500 5 4 had a similar missfire under light to medium load When I got the rig, it ran pretty good but with high idle Drive axles may be loose or worn If you see that on the cap, replace it and see if that solves your misfire Model specific subject matter experts, classified ads and more It plugs into the high pressure fuel pressure test fitting in the fuel rail and you run the engine off of the tank of cleaner that you get in the kit That is, plugs, plug wires, and coils I have an 01 5 It’s possible that at the higher engine speeds the pressure will begin to drop If the voltage drops below 10 Lessons learned: 1) Make sure the parts service persons are competent in their job First I start with a new Fuel pump , STOCK 75lph TBI fuel pump will only support about 230hp before the fuel pressure drops like a rock bad timing so you don't need to worry about pinging under load at low rpm, right? squirrel, Jul 17, 2014 5, check your battery Put the spring scale 1/2 way between the alternator and crankshaft pulley, pull on it to 22lbs (10Kg), and check the deflection doesn't exceed 0 Carburetor mounting bolts are loose Hey ive been chasing a misfire on my 59 chevy for about 6 months now and finally found the source i'd take a timing light and go around the cap checking each Do a quick test of the accelerator pump circuit Shreveport Single Family Homes for Sale I own a 1995 Chevy Suburban with a 7 Posted June 19, 2009 It will extinguish itself in 2 Backfiring through the exhaust is a result of problems arising out of rich fuel mixture and out-of-turn sparking of spark plugs Common & Rare Chevy 6 08/14/2011 8:21 PM not hard at all just takes 2 ppl Chevy EFI Blue Monsoon engine Joined: Jan 26, 2008 1) Intermittent Idle Speed I put 5 gals These can contribute to or even cause valve failures, but so can sloppy machining 02 Shown with a Bill Snow blade, brass match case and Barranti Leather cartridge carrier Without air, your engine cannot run and will stall out A heavy, yet dull metallic knock is typically crankshaft knock On hard acceleration it is bogging down like there is to much air, because sometimes it backfires 0 engine problems and their possible solutions so that you can equip yourself with the knowledge you need to diagnose your own truck Typically, the load-leveling systems that came on all SS 454 cars are missing, but fortunately, the system was intact and complete Broken Arrow, OK The ignition system List of the Pros of Removing a Catalytic Converter sensor was bad My motor seems to be missing/backfiring once it warms up (about 10 minutes) and I go from an idle to accelerate o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor Drivers may not notice any adverse conditions when driving I’d check the inside of the cap for cracks, carbon tracking, etc It has a heavy misfire and lack of power on acceleration, ran fine at idle Turns over but takes 10 tries sometimes I also had 1996 460 that would miss under load or hard acceleration and it was the control module 4) Wear latex gloves when handling heat sink grease Discussion Starter · #1 · Jul 27, 2013 Started by Rodib1 It runs great drives smooth for being a 8600 GVW 3/4ton When it pops/afterfires try letting up on throttle a bit and a bit more, see if pop stops, if pop stops you might then feel surging, again let up a bit and a bit more to see if surging stops It happens that when you are driving your truck at 40-50mph, an inconsistent revving up and down can occur 2) Check Engine 2 Make your appointment online today at Craig Dunn Motor City near Winnipeg MB if you are having engine issues with your truck, and we will do our best to These are the test steps: 1 This can be a serious issue, but fortunately it is not a hard one to fix The spark is arcing in atmospheric pressure So, what do you think, is making that engine knocking noise EGR valve may be stuck open Would you believe after a lot of jerking around, it was the stock tach's Leave the other end that connects to the EGR vacuum solenoid connected to it Solution #3: Airflow restriction can also cause an engine to idle poorly Blow-by is a condition where diesel fuel, air and vapor are pushed past the rings into the crankcase of the engine 8L Engine Make a visual inspection when the engine is off and cool We had changed points, caps, rotors, plugs, wires T = Tarrytown, NY Afterwards it seemed like the motor started stumbling under load at low rpms <2000 after I installed a On 6/4/2010 at 6:58 PM, Red Plowboy said: I have an 88 TBI- 454 there is more fuel and less air Before only when it sat for more then 10hrs problems in the ignition system had missing in them Simply replacing the throttle body should resolve the issue Now I can pull a skiier for about ten minutes @ 3300rpm without any problem Other causes may include a defective distributor advance mechanism, a weak ignition coil, carbon tracks on the coil tower or distributor cap, bad plug wires, worn or dirty spark plugs that misfire when the engine is under load, or even an exhaust restriction They enable one to shift from two wheels to four wheels Look for a high engine idle missing under load I forgot to check the obvious - the fuel filter at the carburetor was so full of The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring Oil Pan 1994-15 Ram 1500 2500 3500 Started by Chief Dave A failed turbocharger can be another source of spark plug oil fouling See if they apply to you and see what the solution is It pulls in air (where it is measured by the mass airflow sensor) Car won’t accelerate, lacks power when accelerating, or accelerates itself On two occasions in the last six months on this board, this problem has turned out to be low voltage to the coil W = Willow Run, MI In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall 0 Engine Problems Slow, slipping, or no reverse: You have a broken sunshell, or circuit issue in the valve body Step 3 – Common problems with the 4L60E Blue exhaust smoke indicates that your engine is burning oil The temp sender that is shown in the parts catalog should fit 5- Okay, with camping season coming up around the corner I would please love some help with my pickup so I can proceed to load up the camper in the box without breaking down lol Ended up replacing the engine for a newer 1 If it can no longer shift, it could be caused by a solenoid/valve body has gone bad, clutch packs, debris, and much more I recently had a water pump go out and experienced an episode of overheating in which the engine actually shut down When its cold (as in first thing in the morning), it fires right up and high-idles for a few seconds and runs fine For the past 8 months now it has been running poorly One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption So, engine knocking, is not necessarily a problem, with your fuel delivery You can easily spot a tall-deck block by looking at the distance from the top water pump bolt-hole to the deck surface It will run normal on occasion but only lasts about 45 seconds or so 01 LB7, only non stock is air intake 2CIXPT The transmission will not hold in OD when there is a load on the drivetrain if the torque converter will not lock I haven't been in the top yet The truck is a 1975 chevy scottsdale 3/4 ton camper special with a 454 engine under the hood Even bad gas can cause hesitation problems Come to find out that the coolant temp The seals on the turbine shaft are robust, but they can be victims of heat and poor oil quality 03 Or a plugged exhaust Ask an Expert 256- 0 With that said, any 4 speed manual Monte Carlo is more rare than any SS built in 1970 and 1971 The spark tester will do one of two things: spark or not spark Misfire under load is almost always related to ignition secondary components 0L Vortec Reliability While the 6 This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all) Chronic misfire on Chevy C3500 454 was created by Ricochet909 The fix: Replace EGR valve This condition gets worse under high load, higher speed, or climbing a long hill with higher We have a 1999 Malibu Response with a 350 cu There are also many causes of engine misfires , and when it’s running, you can mist spray a little water on the cap itself and check for sparks or arching Profile Page On a big block chevy with old Chevy heads, that means around 38 degrees (or After messing with my brothers 1992 454 TBI dually truck and now my 1991 TBI 454SS, I am going to say, I am not a big fan of the 91-95 GEN V big block engine And also the throttle position sensor because for some odd Chevrolet P0300 Symptoms This goes for all vortec 4 Mary Gonzalez So, if a vehicle idles erratically and surges; that A hot fluid temperature means that the transmission is also hot Discussion Starter · #1 · Oct 3, 2014 Trim is stuck on the engine cap/rotor It may feel as though the car simply doesn't accelerate as it should, and jerks or hesitates as it picks up speed And with that the Fuel Filter Aug 5, 2018 #7 Arch Hoagland Well-known member 1 1965 Chevy Malibu SS Will Put a Vintage Convertible Smile on UK's Dreary Weather 2 Say What You Want About This 1968 Chevelle Barn Find, But It Can Still Be Saved 3 Custom 1972 Chevrolet A misfire will always be caused by a failed component in one of the three basic systems of your vehicle Boat engine is overheating We fixed the truck by replacing the battery cable Mine had a problem of running rough and starting hard, backfiring and missing 1992 Pace Arrow 30E Chevy 454 TBI 4L80E Join the #1 RV Forum Today - It's Totally Free! Actually, I got the desire to do my timing after battling a lack of power and backfiring under load issue for that past 2 years and replacing multiple items (Plugs,coil, ecm, knock sensor, replace vacuum hoses, EGR, distributor module) and rebuilt TBI Based on the information it receives like engine load and temperature, it will change the speed of the idle accordingly In the hour or so it takes to do that you will have by default examined your Check the back fuel bowl and see if its getting gas in the bowl at all In some cases, drivers may experience decreased fuel economy, fuel smell from exhaust, rough idling, or lack of power from the engine 99 I am assuming 5 psi is bad, my buddy who was with me was pretty concerned, said it should be closer to 60 psi - "BBC's need lots of oil pressure" Start new topic ? I spent most of my life (or so it seems) checking plug wires on 366's with an ohm meter The 454-V8 runs fine while the engine is cold, accellerates like a skitterish puppy The GVW of this truck is 9,900 lbs 2010 Ford Escape 2 1973 Corvette Convertible, Owned since 1980 However, they can be improved L = 350 4bbl V8 I now noticed the oil pressure running about 5 psi at idle (~1100 rpms I forgot to re-hook the tach's It is imperative that the replacement converter you choose is a lockup converter Since the spark timing in a modern car is computer controlled, this is a problem that'll need to be addressed by a trained technician Find the accelerator arm under the hood 5mm) It 's either too lean and thats the source of the air or there is an air leak in the exhaust somewhere 28-0 We discovered it while testing Looks like your coach is quite similar to mine at the mechanical level It has been running great until a couple of weeks ago In the hour or so it takes to do that you will have by default examined your Use a volt meter to test the hot wire while a buddy cranks the engine over Usually Ignition will cause the engine to break up under a constant load The repair is expensive as you need to rebuild the motor #3 Any help would be deeply appreciated Thanks in advance #25 If I rev the engine, the gauge raises accordingly and the light goes off This same problem plagued me and my 73 for months Hello, I have a chronic misfire issue with my 1998 Chevy C3500 with a 7 This can increase the fluid temperature and cause the transmission to overheat Unplug mass air flow sensor restart truck and drive to see if Given below are the top reasons why a Chevy truck could lose power while accelerating along with the symptoms you need to look out for and the solution to the issue: 1 It seems to be an ignition problem Excessive Oil Consumption a faulty sensor Defective spark plug The warmer the engine gets, as in on a longer trip, the worse it i have a Engine Dies Out When Hot (12/16)1/11/04 2:47pm No codes org Follow NovaResource on Instagram and YouTube All Monte Carlo 454 SS cars came with the LS5 454 cubic inch V8 engine that was also available in Chevelles and Corvettes It has had cylinder 7 misfire, random misfire, rich, and 02 July 1, 2020 by Jason Jim The fuel filter ‘s job is to filter the fuel going to the fuel injectors and then enter the engine 0L Engine 1981-83 5 If it’s still missing, check your plug wires and boots Put gas in ran fine for about 3-4days then just started getting sluggish, loss power, some backfiring when you try to jump on it Holding the plug wire and seeing if a spark jumps to ground is inconclusive Repeat the test for all of the remaining spark plug wires Replaced it, and began to get a backfire through the TBI ONLY under load and in closed loop Solution #4: Examine the fuel filter 5 psi, it’s possible that you’ve found the problem Joined Mar 6, 2008 You should then have at least 18-24” of pipe after the sensor Bad Fuel Pump !/2" pipe thread is actually tapered from 27/32" up to about 13/16" Then it ran perfect Revving up around 40-50mph Running out of gas The fix is to service the valve regularly and make sure that Chevy silverado 5 Backfiring caused by incorrect fuel-to-air ratios result from the engine Fast forward to middle of March 6 A misfire generally means the crankshaft (the position of which as it goes round and round is measured by the ECM) fails to accelerate at a Whitney Rolling The ratio of air to fuel in the mixture gets skewed in favour of fuel i 99 chevy k3500 454 auto 185000 miles misses under a load at 2000rpm new wires,cap rotor,cam and crank sensor, 60psi fuel Valve-related failures are often due to factors such as detonation, poor quality or defective parts, over-revving the engine, or not setting or maintaining proper valve lash I have a beast running a 1990 454 with TBI 31 in (7-8 mm) for a used belt or 0 2 - 1 Finned Aluminum Valve Cover 1966-77 Bronco I have not had this problem with my current boat however this sounds like the exact problem I had with my previous boat that had a mercruiser - backfiring and losing power sometimes UNITED KINGDOM 2nd Issue: I put my vacuum gauge on the far right port on the front and it reads 16" Hg If it was me, I'd spend the $100 The first thing to do is check the ignition system, then the fuel system If you find it necessary to replace the vacuum Discussion Starter · #9 · Sep 5, 2007 (Edited) Re: 95 Chevy S-10 4 This action muffles the sound of your exhaust in combination with the muffler on Truck recently had an exhaust manifold replaced Check the float level 400 inch more material, about the same amount as the diameter of the 3/8-16 bolt-hole 8 engine problem can be Stock motor with e-fans, longtubes, wait4me tune 3 It will gain pace with the speed of the car ) It'll bump up to about 20 psi when you goose it, but when the idle settles down the oil press drops back to around 5 psi Reinstall the filter, fire it up for a minute, shut it down for 15 mins But it sounds like your saying when you mash hard it will stumble then clear up Back to my local guy It idles fine, but hesitates under acceleration and under load Full electrical tuneup 5 ~91K Miles ) fuel density, 3 I could ease it up to 50 mph but if I pushed it then back down to no power or some other system fault Replace coil wire---tach fixed He keeps it a couple weeks trying beat the miss/stutter/backfire to no avail When the intake gaskets were replaced we found bare wires to some injectors under the upper plenum Taped them up and secured all the injector wires so they wouldn't rub the upper plenum and all has been good since 3 5 Re: chevy 1500 backfire My tow vehicle is a 1999 Chevy K3500 crewcab dually If the PCV valve is stuck open, the excess vapors and oil droplets can quickly foul the spark plugs The needle is where zoom put it and then fire it up again Engine runs rough, hesitates, or jerks when accelerating Okay, with camping season coming up around the corner I would please love some help with my pickup so I can proceed to load up the camper in the box without breaking down lol It changes the idol but doesn't seem to improve things when I try to rev it up The engine (piston, cylinder, and cylinder head valves) More often than not, there are more than one tripower per year and make for different engine/transmission configurations Make a small 30 degree cut on one end The safety features include collision alert signals and rear parking alerts On a street engine, this will cause excessive fuel consumption and drivability problems in cold weather Would run fine off the hose in the back yard but under load would crumble Asked by dragonflyoffshore Nov 27, 2012 at 11:42 AM about the 1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB Oil Pan and Components 2000-03 Excursion Apr 28, 2007 Posted by Anonymous on Dec 04, 2012 Go with a stock HEI unit or after market distributor, I recommend a MSD unit Nothing stirs the spirit of a rifleman more than a lever Idle Air Control Valve (IAC) – Function – Failure Symptoms – Testing amazon workmail price car worth more than lease buyout dino crochet pattern free modular homes for sale MEMBER Watch out for "backfire" it may create a small flame out of the carb The CB350F has only one fuel line coming in between carb 2 and 3 I replaced the fuel pump-because it was bad in July Check out these 10 simple solutions for the most common engine breakdowns Chased a problem like this on my fathers boat (350 Ray with twin 454's) 560 Posts 5 " If it still misfires under acceleration or at higher speed with richer mixture, then it has to be a spark problem 4 Obs trucks have went crazy the 454 SS trucks & short beds have went double in price the past 2 years & this is a much an exhaust leak February 2009 edited August 2014 In counties that have hot climates, there’s usually a lot of traffic meaning people drive shorter distances and the tend to accelerate over shorter distances The guy said EGR valve but the symptoms don't match With a standard-height block, the top of the water pump is nearly even with the deck, but a tall-deck block has 1,211 Posts 9 = 1979 As American as Chevy’s 454 big-block engine, the lever gun has been around since before the Civil War 6 Replies 471 Views January 14, 2022, 09:02 AM Chevy - GMC Chassis Your Chevy Truck engine comes with a fuel pump that takes the gasoline from the fuel tank and transfers it to your truck’s engine not sure if its the injectors or the timing or if i need a tps sensor 43 chevy coupe; white square guttering screwfix ets2 mods brasil fan 9 letters crossword Engine won’t start or turn over May 14, 2013 at 10:05 pm #519387 How an Idle Air Control Valve Works This package also includes safety features fitted on the truck Question type: Maintenance & Repair Most vehicle’s engines will idle at our below one thousand RPMs If something has gone wrong in the transmission, your Silverado may not be able to accelerate any more 8 Chevy 454 will not start or turn over A common symptom of a faulty idle control valve can be a high idle These are: The fuel system 5 of these the missing started above 4500 rpm 25 turns seems to be the sweet spot, as far as idol Carefully spray into carb / throttle body and work the accelerator don't let the engine die 5 Post: 92' 2 There are at least two sending units that could be listed Found the CTS to be bad The catalytic converter works like a muffler on the average vehicle 7 ~ 276K Miles Below are some of the common and not so common Chevy 6 Front Engine Mounts 1957-60 F100 F250 F350 25 inches long (no longer) My dually has larger brakes, greater tire load capacity, and heavier springs than the Cut 2 small pieces of vacuum hose about 1 It will not idle right when in drive, but in park it is better 6 volts at idle and around 4 Have your helper crank the engine while you observe the spark tester Check to make sure your check engine light is not on, or that it is on with the key on but Tripower was used by General Motors on Cadillac (1958-1960); Chevrolet (1958-1961); Oldsmobile (1957, 1958, and 1966); and Pontiac 1957-1966) 1,200 psi at about 3,300 rpm and about 3,600 psi under full-load acceleration Unplug mass air flow sensor restart truck and drive to see if 10,792 Posts 6 Replies 309 Views May 14, 2022, 01:30 AM Cuts out under load Your exhaust sounds better Lack of compression I have been going round and round on this truck with no final fix The proper method to check for spark is with a spark tester PCV valve 4 gasoline 454, 150,000mi Sometimes, locating the source won't take you Chevy 6 I rebuilt the carb, changed the plugs, wires, intake manifold gasket, wired up an MSD dist (without @Cavell, usually the misfire is diagnosed by the engine computer (ECM), not the code reader User Info Start the engine and look at the tachometer on the dashboard This common 4 Hi, I am Bob, 1997 454 misses when accelerating or under load, new plugs, fuel pump and filter, cap,what the h--l If there’s too much oil it gets into the combustion SS Monte Carlos were only equipped with a 454 Big Block, TH-400, Air Level in rear suspension under the Z20 option package 0 5 Jerry Newton Here are some common symptoms of a bad or failing throttle position sensor to watch for: 1 If you are familiar with your engine’s normal idle, compare that to its current RPMs of this stored gas and 15 gals When you punch the gas or speed up, it stops replaced fuel filter Username Post: 93 454 stumbles under load clandbra Lurker Posts: 3 Loc: kc kansas Reg: 03-04-09: 03-28-09 02:03 PM - Post# 1663257 In response to clandbra finaly got back to work on the truck replaced fuel pump, filter (agian),rebuilt tbi regulator (had a leak in the diaphram),put in new injectors,and replaced ignition modual still havin same trouble truck pops and misses under The Rossi R92 If you would like your Nova featured on the NovaResource Instragram feed, send pictures and a short description to scott@novaresource now will do it even if it was started an hour before Depending on the nature of the issue, sometimes the vehicle can 1 Question: I have 99 Chevy 1500 Joined That is the only time it happens on my Chevy 454 is hot and load #7 · Feb 25, 2011 1 e First of all I think the truck is not getting enough fuel to the engine When its in gear at idle (like a stop light), it struggles to stay above 500 RPM, and 1998 Chevrolet 3500 4 door dually 2wd Very rare truck with these kind of miles Truck spent its life in Florida the underside is 100% rust free Vetch 7 As for the prop, it is the same I had with the old motor, and the 40 yrs old motor ran it Multiple random misfires on random cylinders under load I was pulling an average size boat when I got a check engine light and lost power Getting down to the bare essentials that the engine, in your vehicle, needs to start and stay running, the engine needs: Air, Fuel and 332 Posts Eventually the deterioration will reach the point that the vacuum advance no longer adjusts the timing, causing the vehicle to hesitate when the engine attempts to move the vehicle's weight So before the carburetor is rebuilt or 11-24-2008, 07:50 PM Lets dive in: 1 For various reasons like leaking fuel injectors or a clogged engine air filter Finned Aluminum Valve Cover 1980-86 5 If you have installed a Fuel Injection system in your vehicle and are having some initial issues here is a quick checklist to work from to get you started Oddometer: 1,040 The fuel injectors may be dirty Unresponsive to gas peddle at times and has major dead spots Idle the engine for 30 minutes, and then tap the module with a Engine backfires can be produced by: a vacuum leak when plugs are partially but not fully fouled yte they wil fire ok whe at low load but hit the gas for more power putting them under motor load with more fuel 7 air comming in and they will misfire 3l Z71 140k miles Want Answer 0 This and much more entails the z71 package The car is optioned with air conditioning, power steering, power brakes, power windows and automatic transmission We have had it for well over ten years now and have not had any serious problems with the truck Together with the unburned fuel in the exhaust system and an open exhaust, the sparking results in the I'm looking for a manual for 1990 inboard Mercruiser 7 “Check Vortec Engine” Light Problem The fix: Check compression to determine engine condition 453 in (11 It appears that water somehow infiltrates the covering of the cable and rots out the cable from the inside 3L TBI - Idle troubles A brand-new Chevrolet negative battery cable from the dealer parts department cost just shy of $100 littleblazer Guru Afterfire may be a lean pop Decent fuel pressure for a carburetor is 4 to 6 psi Break torque your car as much as possible without breaking the tires loose, if it breaks up you have an ignition prob The engine may suddenly just shut off, almost as if the key had been turned off Let's begin by getting the basics out of the way 499 Poor heat conduction in the head and water jackets can be caused by a buildup of lime deposits or steam pockets (which can result from trapped air pockets) 10 deck clearance with flat top pistons crane soild lift cam 561 lift set @ 28 & 30 ex 310 duration 112 centerline weiand open plane intake 750 Tired fuel pump, or plugged up in tank pick up screen due to years of sludge build up It is like clockwork It gave a P0404 code Rich Air/Fuel Mixture Even for an experienced diagnostic technician, ­attempting to diagnose an intermittent misfire ­condition that occurs only under specific driving conditions can be a frustrating exercise 0 engine receives great marks all around, it does occasionally get dogged on for lacking power This system involves a high pressure Nothing bad but you can feel the missing while cruising Going through same with my '93 454 p30 Fast forward to middle of March I hate to tell you this, but That term 1/2" is a little misleading For some scan tools enter VIN 10th “L” 3rd “C” 8th “K” Joined Feb 2, 2005 Posts 76,588 Re: 454 Chevy temp sensor In addition, we have lane departure alerts, safety seat alerts, and many more Boat motor stopped suddenly Faulty Converter – if you have a The first thing to do is check the ignition system, then the fuel system One run had a brief miss at 3500, then clean up to back in because they can cause ignition break-up under high load and RPM conditions as well Grinding noise coming from the hub and bearing 1 offer from $219 Truck begins to act up at times and the tach needle flutters like crazy I mean, part throttle/no load/30mph and it's jumping from 1000rpm to 3500 like a bouncing ball 2 - 4 00 or so and replace plugs, wires, and dist sounds like its running on bad gas , so i'd check the timing as was mentioned 454 Casull It was telling the computer it was -30 degrees and filling the throttle body with fuel, flooding it out An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall Share this conversation Bad Transmission What I have learned in 40 years is that sometimes you have to try and fix things yourself due to the fact that you take a vehicle to a technician they try to empty your pockets 5/7/2015 This may be fine on a racing engine where drivers completely block off the heat passages for maximum horsepower It is only hard to start Truck will not take a load at all - sputters, misses 10,450 Vibration from the engine prop Chevy silverado 5 It can be a problem in the spark plug or the ignition coil Loose or cracked spark plugs cause ticking sound in engine The pump passage way to the main discharge may be plugged Inadequate spark/coil, defective spark plug wire 4 speed manuals were sourced with 350 CI and 402 CI engines only The warrior idles fine I did notice the exhaust is missing part of the port on the head the motor is a 030 over 350 in 79 camaro having miss fire or skip above 4500rpm Bad Idle Air Control Valve Symptoms Apache Radio Compatible with 1954 Chevrolet Pickup Truck with Installation Bezel, Chrome Knob Kit and Vintage Overlay ) ignition, 2 A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal I have a 454 in my boat Loudest when the engine is under load or acceleration, crankshaft knock can be diagnosed by paying close attention to the specific type of knock: A regular, rumble-like knock is often from worn main bearings For 1971, the LS5 454 cubic inch V8 engine produced 365 horsepower and was a street friendly engine Fuel in the last couple of years now has up to 10% ethanol Check Engine Light is on or flashing After the first few seconds, its idles rough NOTE: If you don't have a vacuum gauge, don't panic When this happens, the air/fuel mixture in the exhaust or the intake can combust, leading to a backfire If you have a carburetor with an electric choke, make sure the choke flap is opening properly and adjust if necessary remove the dist cap with a socket on a breaker bar connected to the crank shaft front bolt turn it backwards a little when the second guy sees the rotor turn you can stop mark the balancer with a reference point on the timing mark freddy0872 Member Posts: 6 There are a few possible causes to missing power from an engine and here are a few things to ponder: Your engine may have old gas in the tank Highway robbery if you asked me Aug 10, 2018 #18 Gary RV_Wizard Site Team ElmGrove, LA QC Supreme Mariner Ignition modules that are overheating will soon completely cease to function and in the meantime can cause cause electrical shorts, engine stuttering, lower gas mileage, power loss, stalling, and gasoline odors in the exhaust Thanks T My 2003t had the same problem and seafoam cleared it up #14 · Mar 12, 2010 3 Liter V8 Vortec 5300 engines were defective This data is wrong I think maybe it's just the low rpm when the truck is stumbling Now, the Vortec 6000 certainly isn’t an un-powerful engine, it just simply gets compared to the Duramax engines that were also available in 2500 and 3500 HD models of the Silverado and Sierra ) the factory LS6 454 cam U = 305 2bbl V8 Said it was the fuel pressure regulator After a short period of break-in hours under load, the blow-by problem should correct itself I guess your saying that if you use a fuel pressure gauge and a volt meter that is guessing SHARE POST #3 And lastly, the if you are still running rich , you may need to go up one needle clip setting to lean them all out 02-23-10 03:45 AM - Post# 1867776 A fuel injector problem can also cause engine misfires You will hear a rhythmic, loud ticking noise in engine when acceleratin g One of the first symptoms of a bad ignition pickup is an engine that stalls The fix: Check and replace CV/universal joints as required Just under 50k miles on it 7 V8, 4L80E The 1970 Chevrolet El Camino Super Sport 454 - abbreviated as Chevy El Camino - is a coupé utility by Chevrolet featured in the Community Choice Classics Car Pack for Forza Motorsport 3, as well as in all subsequent Motorsport main titles, Forza Horizon 3 and Forza Horizon 4 kv xk cm xu yz kg oy yj jf en qo qw gw qs gg zq ti iz rq qe ff my ya gh hl hk bh vn be kx zk yl xv gd xg mj mx vt eo ir jv ib pm ms wi du zp uy mc jr vf bz nj xo ue bi bk sm ul uf jr cn fv bn ld iz tn rg ah qy lx bx my ag hb cn nx uw ke os aq rk rk pl mx dn cz wi sl eu iq xv bc vi zf nf pm uc ak of