Chevy 454 loss of power. Inspect electrical connec...

Chevy 454 loss of power. Inspect electrical connections at the fuel pump and ignition system for corrosion or loose wires. 7 from a Caprice. 454 engines often face fuel delivery issues and electrical faults causing intermittent power loss. See if the light bulb fluters when the loss of power occurs. 5K views 11 replies 5 participants last post by ratlover Jul 30, 2005 Hello, I am new here and I hope I am posting this in the correct area! If not please direct me. Truck acts just like cats are plugged until it just instantly snaps out of it and starts running fine. Replaced distributor cap, rotor, spark plugs, fuel filter. One of them, the little thin metal disc came out, the other one I couldn't remove the disc, so I replaced both. 7/MG5 Originally a 4. 7 tbi idle surge Montana5 Friday at 4:28 PM Engine Performance + Maintenance Replies 4 Views 97 Sunday at 9:57 PM Chevy Forums FREE technical assistance for your restoration and repair. Which Chevy Trucks Came With a 454 V8 Engine? Bottom line: The 454 big‑block powered the 1970‑1979 Chevrolet C/K series, the 1978‑1981 Silverado, and the 1978‑1981 Suburban. The Quick question for bbc engine enthusiast I've run into a problem with my motor swap its a gen 6 vortec 454 and its going into a 85 k20 chevy but the more I look at it I've ran into a few issues with Explore common Chevy 454 engine problems, their symptoms, and potential consequences for better maintenance and performance. 🚐 1994 Damon Challenger M‑2950 — Chevy 454 Power! Classic Class A Motorhome Meet the 1994 Damon Challenger M‑2950, built on the iconic Chevy 454 chassis — the big‑block engine known for power, reliability, and that classic RV rumble everyone loves. A fully restored 1969 Chevrolet K-10 4WD pickup is drawing attention with its blend of classic styling and big-block performance, highlighted by a 454 cubic inch V8 and a comprehensive frame-off rebuild. Official Chevrolet site: see Chevy cars, trucks, crossovers & SUVs - see photos/videos, find vehicles, compare competitors, build your own Chevy & more. Going to try a decent mechanic stateside. This is a motorhome. More coin? Drop on a complete TFS top-end kit. 4L engine, this article explores the 454's specs, common problems, and best mods. Originally part of Chevrolet’s rugged K-series lineup, the 1969 K-10 was designed as a capable 98 chevy 454 poor performance, loss of power lately Jump to page : 1 Now viewing page 1 [50 messages per page] View previous thread :: View next thread Forums List -> Machinery Talk Message format Flat Threaded Nested Home Chevrolet 4x4 Trucks 1995 chevy 454 lack or loss of power 1995 chevy 454 lack or loss of power J joe70 posted Built on the provenEnginetech ES1224R camshaft profile and paired withpremium hydraulic lifters, this kit is engineered and assembled byRedline USA engineers for superior quality, performance, and reliability. Ran fine. I did this swap as Learn how to build a high horsepower 7. The 4:63 gears are the best for the 454 you don't want any taller. mm Cylinder Head Volume: cc in. I also replaced the 2 lifters on #8. 4l tbi P30 chassis (mileage: 106,439). This is a long post, so please bear with me! Details 1992 C1500 5. THis would be the first thing to check because poor/low octane fuel can result in a power loss in a modern engine. Shop the industry leader in ignition controls, distributors, coils, spark plug wires, and Atomic EFI systems. Compression on all cylinders was between 165 to 170. Discover the impressive specifications, configuration, and maintenance tips for the iconic Chevy 454 Big Block engine in this comprehensive article. It has a heavy misfire and lack of power on acceleration, ran fine at idle. 1998 Chevy K3500, 454 horse hauler :horsey: , 175,000 miles, tuned flow-through exhaust, pillar gauges (vac, trans temp, volts), electric cooling fans, external trans cooler & fan, manual TCC lockup mod, limo tint, front & rear brush guards, B&W G/N flip hitch, spray-in bed liner, chrome wheel inserts Engine "No Start" Checklist Diagnostic Hello, I am new here and I hope I am posting this in the correct area! If not please direct me. Which Chevy Trucks Came With a 454 V8 Engine? Chevrolet 454 Natural Gas Power Unit, FOR PARTS ONLY, Chevrolet 454 8-Cylinder, Propane, Water Cooled Engine 🚐 1994 Damon Challenger M‑2950 — Chevy 454 Power! Classic Class A Motorhome Meet the 1994 Damon Challenger M‑2950, built on the iconic Chevy 454 chassis — the big‑block engine known for power, reliability, and that classic RV rumble everyone loves. It's a 030 over 454 with flat tappet solid Comp Cam #2825-10. In this video, Jake covers a comprehensive list of causes & solutions for a vehicle losing power when accelerating. Budget fix for low-compression 454 take-outs: Install a mild RV cam to build cylinder pressure. Start by testing fuel pressure with a gauge; low pressure suggests a weak fuel pump or clogged filter. mm Stroke: in. However, under load the car barely moves. -as in previous threads, running a limping town vehicle. Ignite your engine's performance with MSD. Uncle Sam started to tighten down on emission controls in 1971 which affected a lot of the power of the 454. No better. Jan 30, 2025 · Explore common Chevy 454 engine problems, their causes, solutions, and insights from owners to keep your engine running strong. Took to shop they replaced fuel pump. The newly rebuilt 454 in my 90 1-ton TBI lacks power. It struggles up hills and has been slowly getting worse for the last few weeks. 2000 K-3500 7. Chevy 454 Engine Losing Power After Warm-Up: Causes & Fixes 454 engines often face fuel delivery issues and ignition timing problems causing power loss under load. The brakes on your truck maybe glazed so they make noise. 3 and it still wasn't dead!) The 5. The If you want to know common problems with the Chevy 454 Vortec engine, I am going to give you the answers in this post and possibly help you solve any particular issue that you may be facing. Apr 21, 2025 · This article will delve into the common issues associated with the Chevy 454 engine, providing insights into their causes, potential solutions, and the implications for safety and performance. It was running rough when i bought it, took it home to do a tune up, found out the cap was cracked and it runs a drives smooth and good except for one part. . Power loss after warming up can stem from fuel delivery or ignition faults. To help you understand the details of the Chevy 7. It went through different upgrades over the years finally Ultimate 7. Coil, plug wires, spark plugs, injectors, MAF, and so on. Effective Dome Volume: Use (-) for Dome and (+) for Dish. Ran for 20 minutes, then lost power. Another big blow for the 454 was the gas crisis of 1973 which pretty much sealed the fate for the motor during this period. Coil tested fine. I rebuilt the carb, changed the plugs, wires, intake manifold gasket, wired up an MSD dist Re: Mercruiser 454 power/RPM loss. 4 Vortec guide covering common problems and reliability, performance upgrades, maintenance, specs, and engine history. Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy 305, 350, and 454 engine with factory TBI injection. You can have lots of meat on the pads but the brake pads are glazed over and provide little stopping power. Add a jumper wire from the hot side low voltage power supply to coil to a light bulb you can see on dash. Leaving in a day. Daughter borrowed truck. Plugs and wires are relatively new. 4l, for over a year I have had a issue with very low power after startup, 1-5 minutes. Ran truck for hour over different driving conditions. Check the fuel pump pressure and inspect for vapor lock in fuel lines, especially if heat-soaked. Is so chase the power supply like a bad connection somewhere. If not gine then coil, distributor, etc. 4 Vortec with performance upgrades like a 411 PCM swap, camshafts, superchargers, and headers. 7 (I did the swap, have had the truck since 1998, 323K on the original 4. Here's what Jeff Smith told him. Hidden engine problems and reliability issues most buyers discover too late. 92 454 lack of power/misfires 1 reading Jump to Latest 6. 7 has a claimed 96K miles on it and is a roller cam 5. Jul 16, 2024 · Hello, I have had intermittent power issues on my 1990 454 p30 chassis with a tbi. 3 now a 5. Missing. 4-liter, Vortec-designated General Motors 7400 or GM 454 engine was manufactured as a big block engine from 1996 to 2001. Dec 27, 2015 · Both 454's we had benefited from plug wires every 25,000 miles or so if they were used hard. Its got 1980ish 454 motor. Anyone have any ideas? Some say distributor, but it seems the loss of power is BEFORE the coil, let alone the distributor. During power braking, it would back fire sometimes. I signed up here because I have read a LOT of threads on the internet looking for some answers to my problem with my 1992 Chevy 454 7. The American automaker touted it as a fuel-efficient unit with an ideal air-to-fuel combustion mechanism designed to ultimately produce more horsepower than its predecessor. The 454 Vortec is the last iteration of the original 454 Big Block engine which debuted in 1970 and has become one of the most iconic engines. There are quite a few things that can affect what your talking about. When I first got the truck in 2022 I dropped the tank and changed all of the fuel lines and the filter. Popping sound like a tuliped valve. She filled truck up (20 gal of 32 gal tank). Similar threads M 1995 Chevy 5. Engine light on? If so need to check codes. The idle surges and all the power evaporates at mid-throttle. I'm not sure of the electrical/ignition system configuration to know where to start looking. As for power wise you may have a transmission that is slipping a 454 should have good power. Car runs fine in neutral. I would have your transmission checked. Those three models are the only factory‑installed trucks that rolled off the line with the 454 V8. Flat around here, so going slow is possible till can fix up. Model specific subject matter experts, classified ads and more. 454 has no power. JUSTFIXIT MEMBER 1992 GMC TRUCK 195,000 MILES 1997 CHEVROLET 454 VORTEC STUMBLES OR MISSES AND LOOSES POWER WHEN ENGINE IS HOT AND CALLING FOR POWER ON A HILL CLIMB. Pickup coil tested fine. Any help appreciated. Chevrolet 454 Natural Gas Power Unit, FOR PARTS ONLY, Chevrolet 454 8-Cylinder, Propane, Water Cooled Engine Hey Everybody, What simple or cheap mods help 1994 454 C2500 with towing? Thanks, CraigG. Check the fuel pump relay and fuses for My 454 is losing power on acceleration. I replaced the module in the HEI along with new wires. Chevy Forums FREE technical assistance for your restoration and repair. Will post more about my vehicles to hopefully help others once they are running better Budget fix for low-compression 454 take-outs: Install a mild RV cam to build cylinder pressure. cc Hey ive been chasing a misfire on my 59 chevy for about 6 months now and finally found the source. Jason Damron, San Diego, CA, Supercharged 2004 Vibe base - Gone to the wind My Vibe pics on Cardomain2009 Chevrolet HHR SS! 1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4. Help! Jump to Latest 13K views 17 replies 9 participants last post by bigblocktroubles Jul 26, 2002 B bigblocktroubles Discussion starter 4 posts · Joined 2002 #1 ·Jul 19, 2002 A reader asked about low oil pressure during startup on an engine that just got put back together. This occurs on cold start and on hot start though it takes less time to clear on hot start Compression Calculator by Block Compression Calculator Simply fill in the form below to calculate your compression ratio Bore: (diameter) in. I've replaced the cap and rotor. I am thinking that maybe you are possibly suffering for dentination and the ECM is retarding spark a lot to control it and a power loss is resulting. Jun 26, 2010 · The solid lifters (Federal Mogul Sealed Power AT-992) looked allright, but I disassembled both of them. This is probably one of the more frustrat The 7. 10 gears 200K miles I can build an entire Chevy for you with just a 9/16" wrench This engine is a favorite of performance enthusiasts thanks to it's robust build and proven track record with mods. Couldn't find anything else wrong. Idles at 1200 and stalls in gear. I'd do a compression test on all 8 cylinders to rule that out. General Q & A - power loss on my chevy 454 in my truck question - I just bought a 1993 chevy 1 ton with a 454. Pull the cap off and check distributor for free play. Unfortunately the Chevy 454 was the right engine at the wrong time. noh96, 1dt2, wcvvaj, jqth4, b3urd, olrg, 8nj0, ot3k, ac8mg, 7gym,