Pesky High Idle problem on 1992 Grand Caravan 3.3L

Discussion in 'General Motoring' started by jdybber, Nov 30, 2005.

  1. jdybber

    jdybber Guest

    Hello,
    On my 92 Grand Caravan 3.3 I have a high idle problem that
    consistently trips the Code 25 (IAC circuitry). Here is what I have
    checked and replaced.
    Idle Air Conntrol Motor
    Swapped out another ECM from another Caravan
    Cleaned throtle body area and replaced TBI gasket.
    No known vacuum leaks or other gasket leaks
    No other codes found
    The code 25 immediately sets itself even after I disconnect the battery
    for an extended period. I even disconnected the PCM and reconnected.
    It will show the code before I ever start the vehicle again. It
    sets itself when key is in on position and checks voltage.
    Resistance tests appear normal. For those who know a ton more than me:
    What would be your next steps if you were in my shoes? Thanks
     
    jdybber, Nov 30, 2005
    #1
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