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Thread: D5 misfire?

  1. #21
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    Quote Originally Posted by davebb View Post
    Hi I would say it could be the LP pump not working as it should, you can get a pressure gauge kit cheap, or a leaking injector,
    Dave
    Thanks Dave I'll try a few more things, I have ordered Liqui Moly and pipe so I'll do that then Im cutting my losses and selling it
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    2004 - V70 D5 estate - POS waste of money dead and useless
    2001 - V70 T5 P2 -DEAD, bushes, handbrake etc etc
    2002 - C70 T5 - DEAD steering rack, handbrake etc etc
    1997 - V70 T5 ex -armed response unit - killed by a skip lorry, gone but not forgotten
    Next on shopping list - V70R!!!!! (saving hard)

  2. #22
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    Quote Originally Posted by LeeT5 View Post
    Fuel is not sucked into the injectors, the fuel pressure should be minimum 280Bar in the rail to start. Once started, the fuel pressure is kept at a regulated pressure by the FP regulator. A fuel pressure sensor, determines if enough pressure is present in the rail to enable the car to run.
    The injectors simply open/close when switched by the ECM.
    Looking at those fault codes and your symptoms I’d say you have either a faulty regulator or more commonly, the FPS is faulty.
    Sticking/faulty EGR valve would cause it to not restart, especially when cold rather than hot.
    However, once running they never normally cause an engine to just cut out and certainly don’t cause a misfire.
    If the LP pump (or electric pump in the tank) is not running, then the car would never start in the first place.
    I will also say this; on rare occasions it has been known for sludge to build up in the tank. This is sucked into the filter and will cause a low fuel pressure fault code. It will cause the car to cut out eventually and lack of power/performance.

    Hi Lee do you mean 280 PSI rather than Bar as that seems horrendously high and I can't find a pressure test kit that goes that high!
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    2004 - V70 D5 estate - POS waste of money dead and useless
    2001 - V70 T5 P2 -DEAD, bushes, handbrake etc etc
    2002 - C70 T5 - DEAD steering rack, handbrake etc etc
    1997 - V70 T5 ex -armed response unit - killed by a skip lorry, gone but not forgotten
    Next on shopping list - V70R!!!!! (saving hard)

  3. #23
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    Quote Originally Posted by Tee5alive View Post
    Hi Lee do you mean 280 PSI rather than Bar as that seems horrendously high and I can't find a pressure test kit that goes that high!
    No, I mean 280bar NOT psi.
    280Bar is standard starting pressure for most high pressure diesels. When under load at high rpm, the pressure can be as much as 2000Bar in the fuel rail, yes, 2000Bar!! Which is why you should never ‘crack’ the injectors on a high pressure diesel as they will invariably leak, unless you fit new injector seals.
    Last edited by LeeT5; Monday 2nd July 2018 at 14:37.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: TTV SMF + 07 Clutch :: WG 5.0 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV + yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: Brembo Dot 5.1 :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: VolvoTech CFE OBD-V1 :: See garage for full mod list

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    Quote Originally Posted by LeeT5 View Post
    If the LP pump (or electric pump in the tank) is not running, then the car would never start in the first place.
    Not true. My experience is the car will start and run just fine with a knackered in tank pump. You're likely to "run out" of fuel due to it not transferring from one side of the tank to the other, but other than that it'll be ok.

  6. #25
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    Quote Originally Posted by LeeT5 View Post
    No, I mean 280bar NOT psi.
    280Bar is standard starting pressure for most high pressure diesels. When under load at high rpm, the pressure can be as much as 2000Bar in the fuel rail, yes, 2000Bar!! Which is why you should never ‘crack’ the injectors on a high pressure diesel as they will invariably leak, unless you fit new injector seals.

    OK Lee cheers I need to find a fuel test kit that will go up to that pressure.
    http://www.vpcuk.org/forums/image.php?type=sigpic&userid=11614&dateline=143983  7674

    2004 - V70 D5 estate - POS waste of money dead and useless
    2001 - V70 T5 P2 -DEAD, bushes, handbrake etc etc
    2002 - C70 T5 - DEAD steering rack, handbrake etc etc
    1997 - V70 T5 ex -armed response unit - killed by a skip lorry, gone but not forgotten
    Next on shopping list - V70R!!!!! (saving hard)

  7. #26
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    Read the High pressure with a OBD2 and see if it is in spec, I can give you readings from mine if you need it, look at sirobb youtube , I think he shows it at 700rpm,
    Dave

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  9. #27
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    Quote Originally Posted by Tee5alive View Post
    OK Lee cheers I need to find a fuel test kit that will go up to that pressure.
    Use VIDA to see 'live readings' or 'Actual data'.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: TTV SMF + 07 Clutch :: WG 5.0 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV + yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: Brembo Dot 5.1 :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: VolvoTech CFE OBD-V1 :: See garage for full mod list

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    Tee5alive (Tuesday 3rd July 2018)

  11. #28
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    Many thanks guys I'll get on it
    http://www.vpcuk.org/forums/image.php?type=sigpic&userid=11614&dateline=143983  7674

    2004 - V70 D5 estate - POS waste of money dead and useless
    2001 - V70 T5 P2 -DEAD, bushes, handbrake etc etc
    2002 - C70 T5 - DEAD steering rack, handbrake etc etc
    1997 - V70 T5 ex -armed response unit - killed by a skip lorry, gone but not forgotten
    Next on shopping list - V70R!!!!! (saving hard)

  12. #29
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    This explains symtoms and clear understanding of how Diesel injectors fail on a common rail system:



    The fact your symptoms are a misfire, bad starting and long cranking are all indicative of a failing injector.

    2004 V70R 6spd manual:: Custom JRtuning REMAP @ peak 21psi :: Custom 2.75" exhaust :: TTV SMF + 07 Clutch :: WG 5.0 psi :: Tints :: IPD R gauge Rev.3 :: CFWerks door pod :: Forge CBV + yellow spring :: Windowed stock housing + blue filter :: Powerflex :: Superpro Engine mount :: Brembo Dot 5.1 :: TW FMIC :: Eibach 5mm spacers :: Brembo 330mm drilled discs :: iMiV 'Classic'+ BT :: D2R XENARC 5500k + LED H7 + LED H3 :: VolvoTech CFE OBD-V1 :: See garage for full mod list

  13. The Following 2 Users Say Thank You to LeeT5 For This Useful Post:

    davebb (Wednesday 4th July 2018),MoleT-5R (Wednesday 4th July 2018)


 

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