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Won't idle when cold .

Discussion in 'General Technical / How To' started by a4cam, Dec 17, 2007.

  1. a4cam
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    a4cam New Member

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    [Dec 17, 2007]
    OK , my 96 1.8 a4 , when dead cold , starts , but wont idle when cold , holding it about 1500 rpm it will die then just about 500rpm it will come back up to where I am holding it . A good blip on the throttle will clear it for a short while . But only after 1 or 2 mins of running time it will be fine , idles ok ( idles high at operating temp , 1200 rpm due to somebody putting a cable tie under the throtttle cable clip )but dosn't pulse .
    Now , I have had abit of a clean of the throttle body , got as much of the **** out with brake cleaner and a rag , but am tempted to get back in there and have another go and get the compressed air down a fewof the ports I can see . Wise idea ? Other than that am thinkin it can only be an electrical fault , dodgy cold start temp sensor or something . Not fully up to speed on audi engine managment stuff yet .
    Any help appreciated ,
    Cheers Cam
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  3. Caesium
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    Caesium My BM is fixed!

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    [Dec 18, 2007]
    Sounds like the car is not going onto choke, probably a sensor gone faulty.
    Maybe post up in the VAG-COM forum to see if anyone in your area has it to run a diagnostic.
    I have it and I don't even own an audi any more!
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  4. a4cam
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    a4cam New Member

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    [Dec 18, 2007]
    Cheers , Yea , have posted on the vag.com forum asking for sombody in my area . Whats it worth if you want to sell it ?
    #3
  5. Caesium
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    Caesium My BM is fixed!

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    [Dec 18, 2007]
    I wouldn't sell it to be honest, its worth its weight in gold, as soon as ross tech develop a BMW version of the software i'll be as happy as a dog with 2 dicks!

    They're about 270 quid to buy a geniune one.
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  6. SteveU
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    SteveU New Member

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    [Dec 19, 2007]
    It'll need a new ECU temp sender, it's a pretty common fault on the 1.8.

    Should be one of these

    Hope this helps
    #5
  7. a4cam
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    a4cam New Member

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    [Dec 19, 2007]
    Cheers , have friday off , so will be goin somewhere to get this thing diagnosied ,think there could be a couple of other things checked , then off to where I work to hijack the host for the arvo , have an exhaust leak to weld up as well .
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  8. a4cam
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    a4cam New Member

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    [Dec 21, 2007]
    Well 10 Pts to SteveU , had my codes read , coolant sensor was one of the faults that came up , the others were faults that related to the coolant sensor . So one £15 sensor later and 5 mins to fit it , job sorted !
    #7
  9. SteveU
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    SteveU New Member

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    [Dec 27, 2007]
    Glad to be of service!!
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