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Thread: LS1 - Heavy Surging (Undriveable)

  1. #31
    Registered User Milkman Don's Avatar
    Join Date
    Feb 2013
    look behind you
    Maybe call a priest?
    Quote Originally Posted by Faux Forg View Post
    I agree with Rdyno

  2. #32
    Registered User
    Join Date
    May 2013
    Bowling Green KY
    Is this drive by wire or cable throttle?

    I've had other cable throttle GM's do this sort of thing when the TPS had a bad spot in it at idle/right off idle, and also had small vacuum leaks do this. The vacuum leaks cause the idle control motor to not have good control of the idle air volume, and in some cases causes a surging idle that goes away if you add a little throttle. The bad TPS doesn't go away with slow or steady state throttle, but sometimes free-revved OK.

    Just stuff to look at-do you have a scan tool to plug up?

  3. #33
    Registered User [TUFFVQ]'s Avatar
    Join Date
    Jun 2008
    Good advice re: TPS. I'll order one in any case, should be a cheap check.

    Edit: CTS and TPS Ordered
    Last edited by [TUFFVQ]; 13-12-17 at 01:55 PM.

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