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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
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    wallace78 Member

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    [Apr 10, 2012]
    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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  2. vrbob
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    vrbob Thats no Moon, Thats a space station!

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    [Apr 10, 2012]
    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.
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  3. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Apr 10, 2012]
    Highly unlikely glowplugs in this weather, Coolant Temp Sensor, crank sensor, MAF sensor or dying battery.
    #3
  4. wallace78
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    wallace78 Member

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    [Apr 10, 2012]
    thnx ill hav my m8 hav a look n c if its that :icon_thumright:
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  5. wallace78
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    wallace78 Member

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    [Apr 10, 2012]
    i just changed the temp sensor so ill check the rest cheers jo jo
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  6. wallace78
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    wallace78 Member

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    [Apr 10, 2012]
    but i bought the cheap temp sensor think ill buy the proper one n try it first
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  7. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Apr 10, 2012]
    I'll move this to the B6 section.

    I'd get the fuel pump timing checked with VCDS too.
    #7
  8. Turkster
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    Turkster Bro.Paul 2.5TDI Quattro Sport

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    [Apr 10, 2012]
    try re heating the glow plugs and then fire it up.
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  9. wallace78
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    wallace78 Member

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    [Apr 11, 2012]
    cheers james
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  10. wallace78
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    wallace78 Member

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    [Apr 11, 2012]
    tried that turkster m8
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  11. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Apr 11, 2012]
    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
    #11
  12. AlexGSi2000
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    AlexGSi2000 Well-Known Member VCDS Map User

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    [Apr 11, 2012]
    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....
    #12
  13. dope
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    dope alcoholic pervert

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    [Apr 11, 2012]
    My money's on this
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  14. Turkster
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    Turkster Bro.Paul 2.5TDI Quattro Sport

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    [Apr 11, 2012]
    Iv not seen this one but will wait for the result as its not ruled out on other VAG cars.
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  15. stu_m
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    stu_m Well-Known Member VCDS Map User

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    [Apr 11, 2012]
    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
    #15
  16. wallace78
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    wallace78 Member

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    [Apr 12, 2012]
    I put a proper sensor in and its made a big difference well pleased
    #16
  17. janis-karklins
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    janis-karklins New Member

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    [Apr 12, 2012]
    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:
    #17
  18. wallace78
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    wallace78 Member

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    [Apr 12, 2012]
    Will keep u up 2 date with mine 2 see if thus works
    #18

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