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S3 will not start

Discussion in 'A3/S3 Forum (8L Chassis)' started by ash3435, Dec 6, 2009.

  1. ash3435
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    ash3435 flat out if in doubt

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    [Dec 6, 2009]
    hi everyone, i hadmy car revo stage 2 on Tuesday and all was OK.came to it Wednesday and it wouldn't start.had the AA out and they said it was the cam-belt gone.luckly it was OK (silly AA bloke) but still paid for it to be done.the car doesnt want to fire, there is a spark at each plug and fuel going into the engine.fuse 10 did blow twice.had vag com on it and there is no fault.its not the immobilizer as my friend who works at Audi checked that.can anyone help?
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  3. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Dec 6, 2009]
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  4. ash3435
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    ash3435 flat out if in doubt

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    [Dec 6, 2009]
    no he didnt check the starting problem out first as we didint no if the belt had snapped.all i no about fuse 10 is, it puts power to the fuel pump, dont no if it does any other sensors.what do you think it can be
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  5. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Dec 6, 2009]
    When you checked for fuel, may i ask how you did this?

    Did you remove the fuel rail and see if the indavidual injetcors were spraying?
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  6. ash3435
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    ash3435 flat out if in doubt

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    [Dec 6, 2009]
    i checked from the two pipes that go to the fuel rail
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  7. ash3435
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    ash3435 flat out if in doubt

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    [Dec 6, 2009]
    1 a flow and the other a return. when i took the plugs out and turned the engine it was firing the fuel out
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  8. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Dec 6, 2009]
    right, so fuel seems ok however the fuse blowing would indicate some kind of fault. The coil wiring is a common short, i would try the injectors plugged in to make sure they are firing. If they are it's most likely the crank sensor failing and send incorrectly timed signals for the spark/spray in my experience so far

    Assuming all was well with the physical timing. It's not turning over too fast by any chance is it? I have had a bottom pulley key shear, that put the physical timing out, but the belt looked intact still, and it still sparked and sprayed as it should
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  9. ash3435
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    ash3435 flat out if in doubt

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    [Dec 6, 2009]
    funny you say that, the wiring did look f***ed from the heat off the engine.could see the copper cores on most wires.the fuse has held while i tried turning it over
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  10. ianysm
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    ianysm Active Member

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    [Dec 6, 2009]
    Sounds like you found the problem then!
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