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Audi A3 warm start problem

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  • 07-07-2016 9:46am
    #1
    NATLOR
    Registered Users Posts: 2,287 ✭✭✭


    I have a 06 petrol A3

    Recently its giving me problems starting when the engine is warm.

    Its fine starting from cold and if I drive and leave it for up to 15 minutes or so it starts fine too, anything longer than that (even after 2/3 hours) and it takes 2 or 3 attempts to fire it up.

    Any ideas/help appreciated.Thanks


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    #2
    Harry Palmr
    Closed Accounts Posts: 40,061 ✭✭✭✭Harry Palmr


    Its almost certainly the water temp sensor, once they start playing up either a cold start is impossible or a warm start is! If it's failed/wonky then the ECU gets bad information and will deliver the wrong amount of fuel.


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    #3
    NATLOR
    Registered Users Posts: 2,287 ✭✭✭NATLOR


    Harry Palmr wrote: »
    Its almost certainly the water temp sensor, once they start playing up either a cold start is impossible or a warm start is! If it's failed/wonky then the ECU gets bad information and will deliver the wrong amount of fuel.

    Great thanks for that,i'll get it checked out


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    #4
    irish bloke
    Registered Users Posts: 2,057 ✭✭✭irish bloke


    get it scanned before you replace the sensor or else you could be just wasting money on something that may not be the issue


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    #5
    CorkMan_
    Registered Users Posts: 199 ✭✭CorkMan_


    May or may not be of any use but my '00 A4 had a problem with not starting when warm. Turned out to be the crankshaft sensor.


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    #6
    NATLOR
    Registered Users Posts: 2,287 ✭✭✭NATLOR


    CorkMan_ wrote: »
    May or may not be of any use but my '00 A4 had a problem with not starting when warm. Turned out to be the crankshaft sensor.
    Yeah did a bit of googling and both the coolant and crankshaft sensors were mentioned as possible causes. I have a decent mechanic so will get him to test both and see if anything shows up.


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