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Reman Ecm problems, misfiring, trying to plug the old one back in

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by B5love08, Sep 24, 2023.

Page 3 of 4
  1. Sep 25, 2023 #21
    B5love08

    B5love08 Light Load Member

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    Above pictures are inside stock ecm socket
     
    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #21
    Bean Jr. Thanks this.
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  3. Sep 25, 2023 #22
    AModelCat

    AModelCat Road Train Member

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    Other side of that socket
     
    AModelCat, Sep 25, 2023
    AModelCat, Sep 25, 2023
    #22
    Star Rider Thanks this.
  4. Sep 25, 2023 #23
    B5love08

    B5love08 Light Load Member

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    I saw the Allen key. Now I'm trying to get each individual wire into clip
     

    Attached Files:

    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #23
  5. Sep 25, 2023 #24
    Star Rider

    Star Rider Road Train Member

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    Make sure you put it on in the right position, that 'L' shape slot in the plug goes over a pin in the ecm.
     
    Star Rider, Sep 25, 2023
    Star Rider, Sep 25, 2023
    #24
    AModelCat Thanks this.
  7. Sep 25, 2023 #25
    B5love08

    B5love08 Light Load Member

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    Oh no....ok lol. It can only go on 2 of 4 ways so 50/50 shot
     
    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #25
  8. Sep 25, 2023 #26
    AModelCat

    AModelCat Road Train Member

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    Look at how the harness sits in the truck in relation to the ECM. Unless you moved the harness a lot it should naturally sit how it would if it were connected to the ECM.

    If you post engine S/N someone with SIS access might be able to provide you with a harness pinout. There were Cat schematics stickied at the top of one of the subforums. You might find something useful there to help.
     
    AModelCat, Sep 25, 2023
    AModelCat, Sep 25, 2023
    #26
    Star Rider Thanks this.
  9. Sep 25, 2023 #27
    B5love08

    B5love08 Light Load Member

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    I'm so screwed I don't know what I'm doing
     
    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #27
    shatteredsquare Thanks this.
  10. Sep 25, 2023 #28
    Star Rider

    Star Rider Road Train Member

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    Those 2 pieces you pulled out of the old ecm today are different make sure you put them on the right plugs.
     
    Star Rider, Sep 25, 2023
    Star Rider, Sep 25, 2023
    #28
    Bean Jr. and AModelCat Thank this.
  11. Sep 25, 2023 #29
    B5love08

    B5love08 Light Load Member

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    Yea I have no idea what I'm doing and can't find a mechanic in my area to help
     
    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #29
    Bean Jr. Thanks this.
  12. Sep 25, 2023 #30
    B5love08

    B5love08 Light Load Member

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    Nov 20, 2019
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    I've been trying to but the buttons clip on the bottom wires and top clip on the top wires. Been haveing a hard time lining all the wires up to put back into clips but not easy. I've been using tooth picks to to line up but not working well. They won't go all the way in they stop before bottoming out
     
    B5love08, Sep 25, 2023
    B5love08, Sep 25, 2023
    #30
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