poor idle

  1. WT_suburban

    occasional rough/hunting for idle, and hesitation and jumpy acceleration

    Hello people of the GMT400 forums I have been trying to hunt down an issue with my 1994 GMC K1500 suburban for the last 3 weeks now where it will occasionally on start bog and hunt for idle on start up, as well as under hard acceleration hesitate and jump in RPM. The truck has and L05 5.7L TBI...
  2. A

    Bouncy Idle, Eventually Dies 94 Chevy Pickup

    94 Chevy 5.7 It runs fine while driving, but when you stop, the idle bounces then eventually stalls Replace IAC, TPS so far with no change Video shows whats happening
  3. 96CK

    1996 GMC Z71 - 220k - Rough Idle/Hard Start - New to Me

    Well, I suppose this is as good a place to place an introduction as any. To start off with, it feels good to be back on a forum, I haven't been on one since I had an LS1 powered F-Body. Alright, so I just purchased this truck as a fixer to daily driver project. They just don't make them like...
  4. Z

    Hard/No start then runs fine

    I have been dealing with an issue that turned out to be a seized IAC valve causing it to bog down on decel or at a stoplight. It would bog down only for a few seconds, except at highway speed, then go right back to normal idle. It would almost sound as if it had a lopey cam in it. Since fixing...
  5. McSweeney

    97 vortec 305 intermittent low power, poor mpg rough idle in park.

    I have a 97 c1500 5.0 vortec it has weak acceleration, poor idle, and horrible mpg. Ive replaced a lot on this engine including all ignition except for the distrutor, and upgraded the injectors to mfi. Still feels the same. Once in a while it will feel better like it has good power again, but...

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