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Low fuel pressure

Discussion in 'Volvo Forum' started by miroelle, May 11, 2015.

Page 1 of 3
  1. May 11, 2015 #1
    miroelle

    miroelle Bobtail Member

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    May 8, 2015
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    i have a '08 volvo d12. the truck is pulling fine but a low fuel pressure code keeps coming up. i believe the reason should be that the fuel system is sucking up air from a small leak. any ideas?
     
    miroelle, May 11, 2015
    miroelle, May 11, 2015
    #1
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  3. May 11, 2015 #2
    Dakota1358

    Dakota1358 Medium Load Member

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    Jun 15, 2009
    Staunton,Va
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    Not to sound like an @55 but if you think its sucking air from a small leak then find the leak.Check your filters make sure they're tight and the gasket is good.Check the fuel lines are tight.Could also be a fuel line collapsing
     
    Dakota1358, May 11, 2015
    Dakota1358, May 11, 2015
    #2
  4. May 12, 2015 #3
    miroelle

    miroelle Bobtail Member

    21
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    May 8, 2015
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    thanks, dakota
     
    miroelle, May 12, 2015
    miroelle, May 12, 2015
    #3
  5. May 12, 2015 #4
    Helowrenchturn2

    Helowrenchturn2 Medium Load Member

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    139
    Apr 23, 2013
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    Low fuel pressure is likely from a weak/faulty check valve (I think they call it an overflow valve) or worn fuel pump. also could be just a bad sensor
     
    Helowrenchturn2, May 12, 2015
    Helowrenchturn2, May 12, 2015
    #4
    miroelle Thanks this.
  7. May 14, 2015 #5
    OldHasBeen

    OldHasBeen Road Train Member

    1,269
    923
    Dec 16, 2010
    0
    Had one several years ago sucking air, it was the O-rings on the fuel shaft going into the fuel pump.

    Mechanic found it by putting on a clear plastic line.
     
    OldHasBeen, May 14, 2015
    OldHasBeen, May 14, 2015
    #5
  8. May 14, 2015 #6
    j_martell

    j_martell Light Load Member

    284
    184
    Jun 12, 2014
    Centre Wellington, Ontario
    0
    That became factory equipment on ALH TDI VW's for that same reason...
     
    j_martell, May 14, 2015
    j_martell, May 14, 2015
    #6
  9. May 14, 2015 #7
    benrab

    benrab Medium Load Member

    326
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    Apr 5, 2015
    Quebec ,Canada
    0
    Just question, since you have the fuel pressure code is your engine crank long time before fire up after two hours stopped ?
    Did the fuel pressure problem occured after fuel filter replacement ?
    Ben
     
    benrab, May 14, 2015
    benrab, May 14, 2015
    #7
  10. May 15, 2015 #8
    miroelle

    miroelle Bobtail Member

    21
    1
    May 8, 2015
    0
    Hi Ben,
    I have had the code before and it was not effecting my truck performance so i was going to fix it when my truck was home but my driver decided to stop at Petro and change the fuel filters. As he did this, the truck came out of the shop and stoped at the parking- no power. They did diagnostic - "injector #1, not responding , u have to bring it to Volvo dealer ". Yeah, right. ..Obviously, it was not the injector because even with 1 bad injector, the truck would have be moving. So, i called a mechanic who took out the air out of the system, reset the computer and the truck drive for 6k miles after that without a problem. I have it home now and i want to find the issue and resolve it. What do you think?
     
    miroelle, May 15, 2015
    miroelle, May 15, 2015
    #8
  11. May 15, 2015 #9
    benrab

    benrab Medium Load Member

    326
    238
    Apr 5, 2015
    Quebec ,Canada
    0
    Hi,
    I need to know, after 2 hrs with engine stop is your engine crank a lot before fire-up ?
    Is the fault code reappear since it was erease 6K miles ago ?
    If so, what is the exact code ?
    Ben
     
    benrab, May 15, 2015
    benrab, May 15, 2015
    #9
  12. May 20, 2015 #10
    Moneymike

    Moneymike Light Load Member

    118
    30
    Apr 17, 2013
    0
    I would guess your fuel pump or the accessory drive is going bad. I get same message and mechanic asked about my fuel pump. I told him it was changed about 2 yrs ago. He said the accessory drive gets old and worn and doesn't make fuel pump push hard.
     
    Moneymike, May 20, 2015
    Moneymike, May 20, 2015
    #10
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