60 series Detroit won’t start

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Iron diesel, May 23, 2021.

  1. blairandgretchen

    blairandgretchen Road Train Member

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    Thats the only other thing if fuel and compression are present.

    I thought fuel check valve, but he said fuel is running.

    Check ECM plug, wiring, power to ECM. Worst case swap out ECM with loaner?
     
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    One keeps it running, the other prevents startup? I can never remember.
     
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  4. jamespmack

    jamespmack Road Train Member

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    Only srs will stop starting. But I normally change both if your doing one. The lower trs won't do anything without a hard electrical fault. Bottom is a "here it comes" top is " there it went". Bottom isn't really even needed.
     
  5. jamespmack

    jamespmack Road Train Member

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    Yep they are much simpler than most made them out to be. Still alot mechanical with electronic controlled injection and monitoring.
     
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  6. little cat 500

    little cat 500 Road Train Member

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    should fire on starter fluid unless the motor has bent valves
     
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  7. kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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    My Detroit 60 wouldn't start all of a sudden. First thing the mechanic at our shop checked was the battery box. There is a little wire that runs from the battery. Or their should have been. It had broke off and fell down behind the batteries out of sight. I would have never noticed it but he went straight to it. Pulled it up, put a new connector on it and hooked it up. Started right up.
     
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  8. jamespmack

    jamespmack Road Train Member

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    Wtf are you taking about?
     
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  9. little cat 500

    little cat 500 Road Train Member

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    You can start a engine on starter fluid it will fire if it don't fire at all it's f###up wont run long no but will start
     
  10. Iron diesel

    Iron diesel Bobtail Member

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    I have power to my ecm from the batteries. I took the valve cover off and checked power at the injectors and there is none, we checked power with the key on and while turning the engine over. Probably replacing the ecm is the way to go?
     
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  11. AModelCat

    AModelCat Road Train Member

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    No. ECM replacement is literally THE last component to point a finger at. Its probably the most reliable part on the truck.

    Don't those injectors run at something like 120 volts? Versus chassis 12 volt?

    Does the ECM have good ground connections? Power is only half the equation.

    If the ECM isn't seeing all the info it needs (usually key power, constant power, RPM/engine position) it will not send any signal to the injectors.

    Exhaust all options before putting suspicion on the ECM. Well over half of all ECMs replaced were replaced for no reason other than someone jumped the gun on proper diagnosis.
     
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