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[Vivaro] Help!Non start common rail pressure maf or what

Discussion in 'Vivaro / Movano Camper Van / Day Van Conversions (including Renault/Nissan Derivatives)' started by HHPP, May 16, 2017.

  1. HHPP

    HHPP New Member

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    Okey. I have 2003 1.9 vivaro minibus. There was a problem over a year that it didnt start sometimes unless i sprayed deodorant/pilot or something easystart to air inlet. I replaced crank sensor in february and it worked fine (almost 3months) until last week it immiedetly shutted down after starting and hasen't started (without boost to air inlet) since then even i replaced the crank sensor again but no help this time.

    Fuel is coming from tank. There is quite a much diesel coming from return line. Is this normal.

    I have been trying to get opcom readings why it wont start. Couble fault codes exist egr and mass air flow low input but these shouldn't prevent starting ...or what do you readers think? Pressure when ignition is on is 350 kpasc and when cranking 8000kpasc an when idling 33000kpasc.
     
  2. mikemhd

    mikemhd Member

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    Location:
    Bristol
    Drives:
    Vivaro 1.9di swb
    Hi,
    try disconnecting the maf to see if it starts. The maf will stop it starting in some cases.

    The fuel pump ignition on looks good at 3.5 bar, cranking is low should be the same as the idle 350ish bar. I would get a leak off test done on the injectors first. Then look at the pressure control valve.

    Hope this helps.
     
  3. HHPP

    HHPP New Member

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    Do you mean valve end of the rail or valve in high pressure pump?

    Yes your answer helps. i have thinked that cranking pressure looks low but then again not sure if the opcomchinaclone is reading it right.

    Why its generating enough pressure when i get engine going but not when cranking.? It seems working fine when i get it running.

    Whatabout high pressure pump? Or worn timing belt. ...it is starting to be time to change it. 100000km since last replace.

    ...and there is coming oil or coolant water under the car ...i think it's oil.
     
  4. mikemhd

    mikemhd Member

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    Location:
    Bristol
    Drives:
    Vivaro 1.9di swb
    I suspect it's down to loseing pressure from a injector leaking back therefore can't hold enough pressure for the fuel rail sensor to tell the ecu to open the injectors.
    When the van is running it can hold the pressure as the rpm is higher and the pump is moving faster and holding the pressure better in the rail.

    Really just get a leak off test done on your injectors.

    Yes the sensor in the end or the rail.
     
  5. HHPP

    HHPP New Member

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    Ok
    You think this is rather injector than pressure pump problem?

    Do you know if these injectors needs to be coded to ecu if replaced? ...Or can they be repaired.
     
  6. Nick H

    Nick H "Red One.." VxON Club Member

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    Location:
    Cornwall, UK.
    Drives:
    150BHP Astra 1.9CDTi, VW Mk5 Golf 1.9PD TDi
    In agreeance that the first place to try is leak back checking the injectors. Seen it several times for non start on these, you'll have one pipe that fills up in no time at all (this would also explain the fuel in the return line).

    Injectors aren't IMA coded on the 1.9's.
     
    mikemhd likes this.
  7. HHPP

    HHPP New Member

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    It seems that you guys are right. Thank you:) At least first injector is leaking so much diesel that it looks almost constant flow. I ques they should return some diesel but not this much. I just did quick test ...removed leaking lines from top of the injectors and whatched if diesel is coming...

    I already ordered one injector. Is there any temporary fix until broken is replaced? ....because my wife is in pretty angry mood because she cant get car runningDDD
     
    Last edited: May 18, 2017 at 8:21 AM
  8. Nick H

    Nick H "Red One.." VxON Club Member

    Messages:
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    Location:
    Cornwall, UK.
    Drives:
    150BHP Astra 1.9CDTi, VW Mk5 Golf 1.9PD TDi
    Sadly no temp fix at all. Now you have to hope that luck is on your side and the old injector isn't seized in the head.
     
    mikemhd likes this.
  9. HHPP

    HHPP New Member

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    Thank you!! Broken injector came out easely and new one was put in place. Now i only need to touch ignition key and the minibus starts.
     

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