1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

270cdi fuel problems

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by moxy man, Jan 5, 2013.

  1. moxy man

    moxy man Active Member

    Messages:
    29
    Likes Received:
    0
    Joined:
    Mar 10, 2012
    Location:
    N WALES
    Your Mercedes:
    CLX 270 CDI 2003
    Hi all,Happy New Year !!!!
    Not so happy here!! Car starts then stops,observed air in fuel pipes.
    Have changed "0" rings,car STILL misbehaving.
    I have read somewhere on the forum that a check valve can be fitted on the line from tank to filter,can anyone tell me where I can buy the valve.
    Many thanks
    Jack
     
  2. mersum1es

    mersum1es Senior Member

    Messages:
    1,956
    Likes Received:
    229
    Joined:
    Sep 25, 2010
    Location:
    Finland
    Your Mercedes:
    W212/-09/350CDI, W219/-07/320CDI, EX:W220/-01/320CDI, EX:W211/-04/320CDI, EX:W210/-01/270CDI
    Is there still air in return lines or just not starting? ALL o-rings changes in all low pressure lines? (Doubt the check valve stuff)
     
    Last edited: Jan 5, 2013
  3. rpe2

    rpe2 Senior Member

    Messages:
    2,863
    Likes Received:
    2
    Joined:
    Sep 25, 2006
    Location:
    Silchester
    Your Mercedes:
    His: 2018 E220 d; Hers: 2016 SMAX
    I think that the non return valve is a red herring.

    As above, is air still present in the pipes, if do, did you smear a little grease on the seals to aid fitting?

    If no air present, I'd be looking at an injector leak off test (not the same as a leaking injector).
     
  4. panason1c

    panason1c Senior Member

    Messages:
    1,927
    Likes Received:
    6
    Joined:
    Apr 19, 2004
    Location:
    Somerset, UK
    Your Mercedes:
    Mercedes ML270CDI, VW Polo 1.9tdi, BMW K1200RS
    Double check the fuel line seals, if they are fine then i would look at the high pressure pump (the large, star shaped pump at the front of the engine) If any of the 3 'heads' of the pump are leaking then that is where air is getting into the system.........tip = check the pump for leaks when the engine is running and COLD, once the engine is warm expansion causes the pump 'heads' to stop leaking.

    ps..... fitting a check valve will be a waste of time, you need to cure the root of the problem.
     
    Last edited: Jan 6, 2013
  5. OP
    moxy man

    moxy man Active Member

    Messages:
    29
    Likes Received:
    0
    Joined:
    Mar 10, 2012
    Location:
    N WALES
    Your Mercedes:
    CLX 270 CDI 2003
    270 cdi fuel problems

    thanks for the advice guys
    ill check all connections again
    jack
     

Share This Page