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Thread: Weird running issues.

  1. #1

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    01-28-2014
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    Location

    Ohio
    Vehicle

    1990 Dodge D-50
    Engine

    4G64

    Weird running issues.

    Hey guys so this is an issue I've been having for several years now. We will start with the vehicle. 1990 D50, 2.4 5 speed, standard cab standard bed.

    Recent maintenance:

    Timing set
    Water pump
    Plug/wires
    New 02 sensor
    New exhaust
    Coolant temp sensor
    Cleaned MAF, but did not test
    There were wiring issues that cause the fuel gauge and turn signals not to work, fixed that

    So the truck has a weird idle. When sitting still it is not steads, varies about 300 rpms if my ear tach is calibrated correctly. Just a steady normal idle, down 300 rpms, back to normal, and back down the entire time its sitting.

    Then the weirder issue. Sometimes the truck dies randomly. It runs great, but sometimes it will just die. Sometimes it restarts instantly and runs fine, sometimes it has to sit for a couple of days before it will start back up.

    Any ideas?

  2. #2



    Array
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    03-20-2011
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    Location

    Pittsburgh, PA
    Vehicle

    1980 Dodge D-50
    Engine

    G54B
    TPS or bad MAF - either will cause the weird idle issue.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    08-11-2012
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    Location

    Richmond, CA
    Vehicle

    1989 Mitsubishi Mighty Max
    Engine

    G63B
    Bad capacitors for the random dying issue, that's a common symptom. Search around on the forum for pictures of the leaky caps and burn marks and where to send the ECU to get rebuilt.
    I can help get your truck to pass California smog! PM me.
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  4. #4

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    Location

    Ohio
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    1990 Dodge D-50
    Engine

    4G64
    Thank you guys for the answers. The bad caps I'm guessing are around the ecu area?

  5. #5



    Array
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    Location

    Pittsburgh, PA
    Vehicle

    1980 Dodge D-50
    Engine

    G54B
    yes just open the cover and look at the board on both sides - look for leaking or bulged capacitors as BradMPH mentioned
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  6. #6

    Array
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    01-28-2014
    Posts
    38
    Location

    Ohio
    Vehicle

    1990 Dodge D-50
    Engine

    4G64
    Thank you.

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