N14 turns over but wont start

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Tnt2120, Oct 29, 2019.

  1. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    I have a 1999 Volvo with a N14 I left the hood open couple days went to start it it turn over but wouldnt fire up even with ether. I changed starter cause it burnt out an engine harness. Was saying data link broken the first couple times now its giving me barometric pressure shorted low an high an also intake manifold pressure shortens low an high. It also keeps blowing grounding fuse to ECM ever time I try starting truck. It did this before all this also but would never kno when cause I could check it an it would be fine for a couple trips then check it again an its blown. But now its doin it everytime i start truck. Someone please help I've checked every ground running from cab to frame an everything seems to be fine with .1 ohms even when I play with harness.
    Please help thanks
     
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  3. DUNE-T

    DUNE-T Road Train Member

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    The first thing to check is the battery connections, then main ground cable and starter ground cable. On my truck the reason for constantly blowed Ecm fuse was the bad main ground cable. Even though it looked alright, it went bad from being old
     
    Bakerman Thanks this.
  4. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    I brand new cables running from battery to starter
     
  5. boneebone

    boneebone Road Train Member

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    Check the fuel pump solenoid that’s mounted under the air compressor or the crank position sensor.
     
    Bakerman Thanks this.
  6. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    Its getting voltage an turns test light on when u turn key
     
  7. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    An I've replaced crank position sensor with new one an whole sensor/actuator harness n still nothing
     
  8. DUNE-T

    DUNE-T Road Train Member

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    Is the big black negative cable also new?
     
  9. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    Yes both cables were replaced with gauge bigger
     
  10. Tnt2120

    Tnt2120 Bobtail Member

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    Oct 29, 2019
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    Even tested all grounds from block to where they run too an get .1/.2 ohms in each nothing more
     
  11. HopeOverMope

    HopeOverMope Road Train Member

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    And the power cable to the ecm is good? Good continuity? 12v going to the ecm?
     
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