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car sometimes is taking a while 2 start, just turning over

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by wallace78, Apr 10, 2012.

  1. wallace78

    wallace78 Member

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    it dosent do it all the time but is getting worse is it the glo plugs or could it be something else guys,cheers my car is an a4 2.5 quattro
     
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  3. vrbob

    vrbob Thats no Moon, Thats a space station!

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    My dads A4 2.5tdi did this for ages turned out the people who did the cambelt before he bought the car didnt time it properly and it was almost 2 teeth out of time. So when he got a new cambelt fitted and the car was timed correctly it now start on the button everytime.
     
  4. jojo

    jojo Looking for Boost!
    Staff Member Moderator Team Daytona quattro Audi A6 Audi Avant Owner Group Audi S3

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    Highly unlikely glowplugs in this weather, Coolant Temp Sensor, crank sensor, MAF sensor or dying battery.
     
  5. wallace78

    wallace78 Member

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    thnx ill hav my m8 hav a look n c if its that :icon_thumright:
     
  6. wallace78

    wallace78 Member

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    i just changed the temp sensor so ill check the rest cheers jo jo
     
  7. wallace78

    wallace78 Member

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    but i bought the cheap temp sensor think ill buy the proper one n try it first
     
  8. quattrojames

    quattrojames Moderator
    Staff Member Moderator Audi A6 Audi Avant Owner Group

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    I'll move this to the B6 section.

    I'd get the fuel pump timing checked with VCDS too.
     
  9. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    try re heating the glow plugs and then fire it up.
     
  10. wallace78

    wallace78 Member

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    cheers james
     
  11. wallace78

    wallace78 Member

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    tried that turkster m8
     
  12. stu_m

    stu_m Well-Known Member
    VCDS Map User

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    Not sure if this affects the 2.5 engine but a dodgy light switch can cause starting problems I've only seen it on the 1.9 up to now

    The switch causes a fault in the off position and the car will take a few turns before it fires but if you put the side lights on it will fire first time

    Worth a check seen as though its easy to check and free
     
  13. AlexGSi2000

    AlexGSi2000 Well-Known Member
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    The bloke who owned my 2.5 before me stated that he had fitted a new battery due to starting issues.

    He said the thing would crank (not really any slower than usual) but wouldn't fire - a new battery sorted it out....
     
  14. dope

    dope alcoholic pervert

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    My money's on this
     
  15. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    Iv not seen this one but will wait for the result as its not ruled out on other VAG cars.
     
  16. stu_m

    stu_m Well-Known Member
    VCDS Map User

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    really? its a pretty common problem there was even a thread not so long back for a replacement headlight switch on ebay for £20 and a few people mentioned it on there
     
  17. wallace78

    wallace78 Member

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    I put a proper sensor in and its made a big difference well pleased
     
  18. janis-karklins

    janis-karklins New Member

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    I have a similar problem on my 2.5TDI. Sometimes, when motor is warm, it needs some time to start. When cold, never had a similar problem. And when warm, not always, just some time.

    Battery fitted new last summer, no faults on VAG-COM. No idea what to else look for :uhm:
     
  19. wallace78

    wallace78 Member

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    Will keep u up 2 date with mine 2 see if thus works
     

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