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Ecm rebuild

Discussion in 'Ask An Owner Operator' started by chevyman85, Oct 10, 2016.

Page 3 of 5
  1. Oct 22, 2016 #21
    chevyman85

    chevyman85 Light Load Member

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    They do a great job.
     
    chevyman85, Oct 22, 2016
    chevyman85, Oct 22, 2016
    #21
    DougA Thanks this.
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  3. Oct 22, 2016 #22
    DougA

    DougA Road Train Member

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    Fairly easy to trouble shoot to make sure that's what your problem is.You have to find your wiring diagram,find the right wires in your harness,and check for power in,power out.
    Power in,no power out,ECM bad.Lots of times it's your harness and plugs,that corrode.Just make sure before you pull it off and send it away.
     
    DougA, Oct 22, 2016
    DougA, Oct 22, 2016
    #22
    chevyman85 Thanks this.
  4. Oct 22, 2016 #23
    Brandt

    Brandt Road Train Member

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    Pittsburgh Power is another company that does rebuilding and ECM turning
     
    Brandt, Oct 22, 2016
    Brandt, Oct 22, 2016
    #23
    chevyman85 Thanks this.
  5. Oct 22, 2016 #24
    m16ty

    m16ty Road Train Member

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    I've done a little troubleshooting but will have to hook it up to computer to find out for sure what it is. Based on my findings, the problem is in the ECM.

    I have the Cummins engine service manual and wiring diagram. Truck just cranks without starting. ECM does have power. Warning light and stop light flashing in cab. It's in a '94 w900 by the way.

    There is no way that I know of to read the codes. The Cummins manual says you'll either have a diagnostics switch or use a shorting plug. I have no switch and can't find a place to insert a shorting plug. Just looking over the fault codes, the only thing that would indicate a no start would either be the cam sensor or something inside the ECM. I did do a cam sensor test and it seems to be ok.
     
    m16ty, Oct 22, 2016
    m16ty, Oct 22, 2016
    #24
    chevyman85 Thanks this.
  7. Oct 22, 2016 #25
    chevyman85

    chevyman85 Light Load Member

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    Georgia
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    My truck was a Rush Truck Center for over a month and they couldnt diagnose the problem, so much for chain shops. After the recommendations I called Midwest Ecm Repair and they diagnosed it over the phone. Dave was like yeah man I see this all the time with the older trucks. After fixing it that ol pete is purring like a champ.
     
    chevyman85, Oct 22, 2016
    chevyman85, Oct 22, 2016
    #25
    HopeOverMope Thanks this.
  8. Oct 22, 2016 #26
    DUNE-T

    DUNE-T Road Train Member

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    So what exactly are the symptoms of ECM going bad?
     
    DUNE-T, Oct 22, 2016
    DUNE-T, Oct 22, 2016
    #26
  9. Oct 22, 2016 #27
    chevyman85

    chevyman85 Light Load Member

    52
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    May 5, 2014
    Georgia
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    My truck would not stay crunk for extended periods of time the fan was not coming on. When Rush tried to reflash ecm it would not hold RAM memory. Midwest said that most of the time once memory goes bad it has to be rebuilt if circuits are burnt however ecm would have to be replaced. Once RAM memory goes bad it does not allow truck to call the program needed to run the truck.
     
    chevyman85, Oct 22, 2016
    chevyman85, Oct 22, 2016
    #27
    HopeOverMope and DougA Thank this.
  10. Oct 22, 2016 #28
    DougA

    DougA Road Train Member

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    When my ECM went bad,no warning.Truck would crank,but no fire,real simple.Luckily this happened in my driveway.Mine was 95 Celect Red Top 500,cpl 1844.
     
    DougA, Oct 22, 2016
    DougA, Oct 22, 2016
    #28
    chevyman85 Thanks this.
  11. Oct 22, 2016 #29
    colorado18spd

    colorado18spd Medium Load Member

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    Dave is the best just take it off and ship it to them, no cost to test it. Glad it went well, @chevyman85
     
    colorado18spd, Oct 22, 2016
    colorado18spd, Oct 22, 2016
    #29
    HopeOverMope and chevyman85 Thank this.
  12. Oct 22, 2016 #30
    m16ty

    m16ty Road Train Member

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    Exactly what happened to mine. Same engine also.
     
    m16ty, Oct 22, 2016
    m16ty, Oct 22, 2016
    #30
    chevyman85 Thanks this.
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