Chevy 454 no power under load

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August undefined, 2024

WebNov 20, 2013 · Restoring a Holiday Rambler 1988 coach with 454 V8 in P30 chassis. Having a problem with the engine. When engine hot on the highway, when second venturi of carb is opened the engine seems to die momentarily. It soon recovers generally without stalling. This happens ofter when pulling up a rolling... http://forum.73-87chevytrucks.com/smforum/index.php?topic=31738.0

GM 454 Backfires - FMCA RV Forums – A Community of …

http://www.73-87chevytrucks.com/techinfo/TroubleshootingTBISystems.pdf WebFeb 23, 2024 · 2. Failed Spark Plug. The second most common cause of a misfiring engine is bad or failing spark plugs. The function of the spark plug is to ignite the air-fuel … town of westport ct taxes

1990 454 tbi backfiring through throttle body Pirate 4x4

WebAug 22, 2013 · 1 Answer. My 1998 454 C3500 has no power pulling a loaded trailer (about 5000lbs). It runs smooth as can be but when load is hooked up the trouble starts. … WebAug 20, 2024 · Chevrolet 454 big blocks were either LS4, LS5 or LS6 engines. The LS6 was the more powerful variant but it was quickly phased out following 1971. LS4 and LS5 … WebAug 26, 2016 · 1992 Pace Arrow 30E Chevy 454 TBI 4L80E Join the #1 RV Forum Today - It's Totally Free! ... 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 only … town of westport ct zoning map

91 350 tbi runs like crap under load Pirate 4x4

new guy needs help, no power under load 454 - 73 …

WebAug 10, 2024 · 301. Currently out west from Florida, riding on the W22 with the Vortec 8.1. It recently began hesitating on inclines. And today?s even on acceleration from a stop. Didn?t notice any of this until after I had to climb a long grade on the way into Monument Valley. WebAug 1, 2013 · Discussion Starter · #1 · Jul 27, 2013. Hey ive been chasing a misfire on my 59 chevy for about 6 months now and finally found the source. Its got 1980ish 454 motor. It has a heavy misfire and lack of power on acceleration, ran fine at idle. I rebuilt the carb, changed the plugs, wires, intake manifold gasket, wired up an MSD dist (without ... town of westport ct vision appraisalWebApr 6, 2024 · Welcome to the FMCA forum. Good old 454's. Start by checking the vacuum advance unit mounted on the distributor. One needs to remover the Cap and the rotor to get a good look at at things, just be real … town of westport electrical permit

"WebFeb 24, 2015 · Weak spark will result in a weak and incomplete combustion of the air fuel mix. this can cause loss of power, usually more noticed under load, without causing a … " - Chevy 454 no power under load

Chevy 454 no power under load

Guide to Diagnosing Common Engine Noises

WebApr 26, 2024 · 3. Engine Not Working. While some common issues with the Chevy 454 engine can be easily fixed, there are some problems that can be quite difficult to fix. One …

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WebMar 6, 2010 · It is my sincere hope that someone here will be able to help me out. I have a beast running a 1990 454 with TBI. When I got the rig, it ran pretty good but with high idle. Found the CTS to be bad. Replaced it, and began to get a backfire through the TBI ONLY under load and in closed loop. Truck will not take a load at all - sputters, misses ... WebDec 28, 2008 · 11-24-2008, 08:50 PM. My '98 Sub 7.4 had a similar missfire under light to medium load. No codes. 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.

WebDec 22, 2024 · 1988 Chevy 454 in a P30 motor home. Bogs under load ONLY when REALLY hot. It is like clockwork. It runs perfect under load and accelerating, when not completely to temperature. ... 1988 chevy 1500 v8 350 no power under load with timing retarded truck will run but idle is erratic or pulses replaced egr, ... WebChevy silverado 5.7 hesitates under load. This goes for all vortec 4.3 5.0 5.7 liter vortecs. Unplug mass air flow sensor restart truck and drive to see if ...

WebThe 454-V8 runs fine while the engine is cold, accellerates like a skitterish puppy. But when the engine heats up to anywhere near normal, it starts missing and bucking under load, no codes. The warmer the engine gets, as in on a longer trip, the worse it runs, but it idles fine under hot or cold conditions. WebAn exhaust tail pipe backfire is caused by an excessive amount of un-burnt fuel remaining in the exhaust system or fresh air being allowed to enter the system which ignites a small amount of un-burnt fuel. STEP 1: UPSTREAM EXHAUST LEAK. If fresh air is allowed to leak into the exhaust system it will ignite the un-burnt fuel inside the system ...

WebJun 30, 2010 · I replaced all the pushrods and guide plates. It's a 030 over 454 with flat tappet solid Comp Cam #2825-10. I also replaced the 2 lifters on #8. Couldn't find …

WebJan 24, 2014 · Piston Slap. A hollow, muffled, almost bell-like sound is usually piston slap. This condition is caused by a piston rocking back and forth within its cylinder. Continuous piston slap means the engine needs … town of westport employmentWebApr 10, 2024 · To cope with the added power, the SS 454 was equipped with a bunch of extra goodies, including power front disc brakes and a heavy-duty rear suspension. With all the required optional extras and a ... town of westport dane county wiWebMar 26, 2024 · This reduces power a bit, but protects your engine against detonation. However, if the knock sensor is not working, spark timing will not retard when it should. Consequently, you may hear a pinging or rattling sound (spark knock); when accelerating, driving up a hill or when, the engine is lugging under a heavy load. Testing The Knock … town of westport employment opportunities