idle

  1. R

    TBI Engine bogging down at idle

    1990 Chevy K1500 305 TBI Need some guidance, gents. I am lost on this one. New motor ran fine for 500 miles then started to run erratic at idle. Got worse over time. Now has 5,000 miles on it. Will run ok on startup then shortly thereafter will begin to bog down to almost cutting off. If I...
  2. MRTHICC3MS

    No oil pressure at idle

    Hello everyone, I’m new to owning a gmt400 I bought it as my first truck and just want to ask some questions about some issues I’m having. When I first start my truck the oil pressure sits around 60 but as it warms up it drops to 0 oil pressure at idle but gains it again when it give it gas, I...
  3. 1989Stepside

    Engine has high idle after every restart

    Hey, I'm having an issue with the idle on my truck. I think I know what the cause is but I'd like a second opinion. I have a 1989 5.7L 350 c1500 2wd Every time I restart the engine after it's already warmed up, the idle will be a bit too high. However, once I put the transmission into Drive or...
  4. P

    Rough Idle with AC on

    Hey yall, so I have a 94 c1500 5.7 v8. The AC ALMOST works. I replaced the ac compressor, orifice tube and the accumulator to get my ac to work kinda right. The only issue is that if I stop at a red light and idle with my ac on then my truck will shutter as the compressor kicks on and off over...
  5. Z

    Odb1 aldl data logging

    was wondering if anyone could help me with my data I have no idea what to be looking for, I have a 1990 5.7 tbi and have been having a random shake at a stoplight and rpm drops for a second and goes back to normal when it shakes. Have replaced too many parts trying to figure this issue out and I...
  6. 0

    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...
  7. OB1214

    Shaky Idle

    Hello all! Hope You are having a great day. I was hoping you guys could potentially help with a slight dilemma I have. I have a 1996 k3500 with a Vortec 454. Ever since I bought my truck back in August I've had a slight shake in my idle nothing serious just something that annoys me when I'm at a...
  8. DylChrFla

    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...
  9. Raspi454

    99 350 vortec rough idle

    I'm not any good at diagnosis, but my 350 vortec doesn't idle nicely, cold or warm. It kinda pulses(?) or it seems like it has a cam in a way, If that makes sense. Going down the road if seems to do alright, but as soon as it idles it's not nice. What do you fellas think? IAC, tune up, something...
  10. 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...
  11. S

    At my wits end.. Looking for any idea.

    Okay, this may be a long post so apologies in advance. I have a 94 1500 with the 350 TBI. I have owned this truck a little over a year now. I bought it with a blown motor because P.O decided to run it hot and then put water in the coolant and it froze and busted the block. Regardless, found a...

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