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2000 454 rough idle and acceleration while cold

I’m stumped and hope someone can help. 2000 454 k2500, hard starting, will crank forever unless you give it some gas and it’ll stumble to start, but once it does it idles at 750-850 rpm (normal?) but seems to have a misfire and you can smell gas out the exhaust. While it’s still cold (100-120 on...
- 00CrewCab
- Thread
- Jul 7, 2023
- 454 help idle misfire rough trouble starting
- Replies: 8
- Forum: Engine Performance + Maintenance
Cutting out during hard acceleration

I know I already posted a different thread about this but we hit a dead end so I now have a video to give better context. When I get on the gas hard 85-100% throttle the truck cuts out and wont go past 3500 or so rpm. it will hit that rev range and the truck just wont accelerate. it also does it...
- greenz97
- Thread
- Feb 14, 2023
- engine fuel filter rough sputters
- Replies: 11
- Forum: Engine Performance + Maintenance
Diagnosing Rough Idle Hell

I’ve been battling a rough idle with my 1991 305tbi C1500 pickup for months now and I’ve gotten no closer to solving the issue. When cold it idles smooth and warms up normally. At idle when fully warmed up it has an intermittent miss/shake. When it does miss it puffs some smoke out of the...
- DylChrFla
- Thread
- Jun 3, 2021
- diagnose idle rough
- Replies: 77
- Forum: Engine Performance + Maintenance
S
New Injectors, now runs bad

Hey all! If you guys remember one of my previous posts from awhile ago I was trying to chase a random shake/miss? at idle, and extended crank time before start. Otherwise ran fine. Well, alot of parts and sensors have been replaced. 94 C1500 TBI 350 IAC Knock sensor TPS TBI Rebuild New Delco...
- Shane Dyer
- Thread
- Sep 9, 2019
- 350 idle injector issues rough tbi
- Replies: 3
- Forum: Engine Performance + Maintenance