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

Repeat and multiple glow plug failure - 3.0TDi

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by AndrewS, Mar 29, 2013.

  1. AndrewS
    Offline

    AndrewS New Member

    Joined:
    Mar 7, 2013
    Messages:
    18
    Likes Received:
    0
    Evening all,

    I bought a 2007MY car with 50k miles and FASH a month ago. During the pre-sale inspection, No.2 glow plug was found to be open circuit. It was replaced with a new OEM part supplied by TPS.

    In this recent cold snap, I noticed that the car was a little reluctant to start and had VCDS hooked up to check all was well and found that No.2 glow plug is open circuit again, as is No.4 & No.5.

    Any idea why a brand new glow plug should fail again so soon - literally no more than a couple of dozen starts, and also why there appears to have been a cascade effect causing the other two to fail?

    No other fault codes appear, just those relating to the open-circuit glow plugs.

    The car has a 3 month warranty, so I'm keen to get to the bottom of it and not be left with a lemon...

    Many thanks,

    Andrew
    #1
  2. SL11CKK
    Offline

    SL11CKK Active Member

    Joined:
    Apr 22, 2011
    Messages:
    650
    Likes Received:
    29
    No2 glow plug should also have warranty from TPS
    #2
  3. .Jas.
    Offline

    .Jas. Member

    Joined:
    Mar 14, 2012
    Messages:
    119
    Likes Received:
    5
    Could well be a problem with the wiring loom. Apparently they get very brittle with age.
    #3
  4. AndrewS
    Offline

    AndrewS New Member

    Joined:
    Mar 7, 2013
    Messages:
    18
    Likes Received:
    0
    So, car going in for six new glow plugs under warranty on Friday - hoping that will sort it. Aside from a visual inspection looking for signs of heat damage, are there any other ways of checking the loom without physically testing the continuity of each and every core?
    #4
  5. Andy27168
    Offline

    Andy27168 Member

    Joined:
    Mar 23, 2013
    Messages:
    128
    Likes Received:
    9
    Sorry to resurrect an old thread I just wondered if you ever got to the bottom of the failing glow plug problem, I have a 3.0TDI, last service said I had a failed No.1 glow plug, and just recently had the management light come on and stay on till I cleared it on VCDS, but then I had No.2 glow plug fail, which was quickly followed by No,3 failing.
    #5
  6. SinghB7
    Offline

    SinghB7 Member

    Joined:
    Dec 17, 2012
    Messages:
    302
    Likes Received:
    32
    The wiring loom for the glow plugs will need changing. Happened to mine just after fitting new plugs, its quite common the looms just get old and brittle.
    #6
    Andy27168 likes this.
  7. Andy27168
    Offline

    Andy27168 Member

    Joined:
    Mar 23, 2013
    Messages:
    128
    Likes Received:
    9
    Was yours a 3.0TDI? I have just looked at the EPC and it appears there is no separate loom for the Glow Plugs, you have to replace the entire engine loom and at a £1000+ for the loom I hope it is,nt that.
    #7

Share This Page