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Thread: Idle Issue

  1. #1

    Array
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    Offline
    Join Date
    06-27-2015
    Posts
    180
    Location

    Bothwell,Ontario
    Vehicle

    1991 Dodge Ram 50
    Engine

    4G64

    Idle Issue

    My 1991 Fuel Injected Ram 50 seems to idle up and down when first started.. even warm. It sounds like it's "hunting" for an RPM much like when the idle screws are set wrong on a carburetor.

    It eventually settles down but it quite annoying.

    Maybe and idle speed motor issue?

  2. #2

    Array
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    Offline
    Join Date
    08-11-2012
    Posts
    1,199
    Location

    Richmond, CA
    Vehicle

    1989 Mitsubishi Mighty Max
    Engine

    G63B
    Has the ECU been remanufactured? Any vacuum leaks?
    I can help get your truck to pass California smog! PM me.
    California BAR Smog Inspector License #EO635469
    "Keep 'em on the road."

    See what I have for sale:
    http://stores.ebay.com/zims

  3. #3

    Array
    Status
    Offline
    Join Date
    06-27-2015
    Posts
    180
    Location

    Bothwell,Ontario
    Vehicle

    1991 Dodge Ram 50
    Engine

    4G64
    It's all original

  4. #4

    Array
    Status
    Offline
    Join Date
    08-11-2012
    Posts
    1,199
    Location

    Richmond, CA
    Vehicle

    1989 Mitsubishi Mighty Max
    Engine

    G63B
    Pop open the ECU and check for any burn marks, bulging capacitors or goo on the circuit board. Take a whiff and see if it smells sharp and metallic. Then check each and every vacuum line for any dryness, cracks or brittleness using the diagram on the underhood label.

    ECU is located under the passenger side kick panel. Look above the relay with a flashlight for 3 yellow plugs. It's hard to get out but it will come out if you jiggle it enough.
    I can help get your truck to pass California smog! PM me.
    California BAR Smog Inspector License #EO635469
    "Keep 'em on the road."

    See what I have for sale:
    http://stores.ebay.com/zims

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