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.

  1. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    Really? ######. Had truck for a year and they were like that when I bought it and never had problem. So what do I do now?
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    But if u can zoom into stock yellow ecm it looks like those exposed ends just plug and play. Not even the stock ecm has a threaded bolt and it just plugs into the extension coming off the yellow ecm
     
  4. AModelCat

    AModelCat Road Train Member

    29,206
    159,134
    Jul 7, 2015
    Canuckistan
    0
    The part you're missing off your harness is stuck in the socket of the original ECM by the look of it. Compare the 2 side by side, you'll see what I mean.
     
    Bean Jr. and lester Thank this.
  5. Star Rider

    Star Rider Road Train Member

    1,506
    12,451
    Sep 23, 2019
    Michigan
    0
    You are correct, part of the harness plug IS in the old ecm on both plugs.This is what the plug looks like when correctly removed.
     
    Last edited: Sep 25, 2023
  6. Star Rider

    Star Rider Road Train Member

    1,506
    12,451
    Sep 23, 2019
    Michigan
    0
  7. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    Ok I'll see if I can get needle nose pliers in there to pull piece out
     
    Bean Jr. Thanks this.
  8. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    I just reached inside the stock ecm and tried to yank on anything inside and nothing in coming out. That black sleeve attached to yellow ecm in held on pretty good. And there is nothing inside
     
  9. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    If you look at my most recent post. Meant to reply to you but replied to another gentleman
     
    Bean Jr. Thanks this.
  10. AModelCat

    AModelCat Road Train Member

    29,206
    159,134
    Jul 7, 2015
    Canuckistan
    0
    That stud, is it actually a bolt that threads in from the ECM side of the plug? Hard to tell in the pictures but looks like it.

    If you stuck your harness into the new ECM looking like it does, there's a very good chance that is why it didn't run right.
     
  11. B5love08

    B5love08 Light Load Member

    68
    38
    Nov 20, 2019
    0
    Are these the pictures ur referring too
     

    Attached Files:

    Bean Jr. Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.