FM12 380 not start

Discussion in 'Volvo Forum' started by ah fai, Dec 23, 2012.

  1. ah fai

    ah fai Light Load Member

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    Aug 21, 2012
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    Hi all

    VOLVO FM12 380 D12D cant start after shut down in fuel station. Trun the key and the starter crank like normal, funny thing is switch on the electrical feel pump for few min but no diesel return into fuel tank

    There is no fault codes,

    best regards
    thanks.
     
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  3. Numb

    Numb Crusty Curmudgeon

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    try manual prime. the primer is on pump.

    round knob, push and turn to release. it comes up, then pump

    but losing prime is bad. why is the question. if that is it.
     
  4. Pablo-UA

    Pablo-UA Road Train Member

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    D12D got no fuel solenoid. They use pump injector units.

    When battery is low and you try to crank engine ECM fuse may blow (#40 as I remember).

    Other problem - it is not easy to prime D12 till you loose bleed valve on top of cyl head.

    FM is cabover, not so easy access like with VN
     
  5. ah fai

    ah fai Light Load Member

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    Aug 21, 2012
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    but i still can bleeding with just loose the valve on the top of cyl head and switch on the electrical fuel pump right?

    how about wiring or electrical control unit check? any idea? maybe immo, sensor..

    thanks
     
  6. Pablo-UA

    Pablo-UA Road Train Member

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    pull all the active fuel codes
     
  7. ah fai

    ah fai Light Load Member

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    Aug 21, 2012
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    Today already doing a lot but the engine still cant run, there is no fuel codes, what is the fuel pressure in the injector rail when the electrical feed pump running?

    and how about engine feed pump?
     
  8. Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    over 0.6 BAR at crancking - engine starts. at idle 1.5-2.6 BAR, faster - not over 4-5 BAR (if fuel pressure limiting valve is good)
     
  9. ah fai

    ah fai Light Load Member

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    Aug 21, 2012
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    thanks for info.
     
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