iac

  1. C

    1992 TBI 454 4L80E. Idle hunts in Park/Neutral but is smooth in drive.

    Hi Everyone, I have been chasing down a idle hunting problem recently. My issue is that in park/neutral the engine idle will hunt for the a stable engine speed. This happens after the engine warms up. When I shift into drive the engine speed stabilizes. The AFR in drive is rich around 11. The...
  2. zer0Limitz

    IAC Issue? Rough idle in park & in drive. Please Help!

    I have a 97 Sierra SLE 5.7L 157k miles. Just fired the truck up today after maybe a month of sitting. I took it for a drive and once I got to a stop light I noticed the truck was running rough while idling (I'm fully stopped pressing brake at traffic light). I almost thought it was about to...
  3. J

    Random shutdown/IAC goofiness

    Howdy fellers. I'm about to drag up a very tired subject, so be prepared ;) My K2500 (1995, TBI, 7.4) Has been giving me some very frustrating issues as of late. Seemingly without warning, it'll shut itself off. Can happen at an idle, or when I'm coasting to a stop, or even under light...

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