Question about 2004 Audi A4

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Audi 2001 a4 1.8t

Hello i have a 2001 a4 which wont star`t on me my battery is good , and my cranking sounds good but just cant get the car to fire up...

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  • badben360 Oct 15, 2008

    mechanical said there is no spark going into the coil into the spark plugs...nothing wrong with the sparkplug or the coil, fuelpump is good....driving me nuts

  • badben360 Oct 16, 2008

    thank you myad51 for ue help i got my car towed to Audi and they diagnos the problem,i have to replace my ECM

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There are two things to check.
1. It is producing a spark.
2. It is getting petrol through.
To check whether is producing a spark.
Remove one spark plug from engine. Reconnect HT lead and hold it touching car chassis and turn the engine. Do no hold the Ht lead with bare hands while doing this as it carries thousand of volts and will give you nasty shock. Hold it with some insulted material .
When you turn the engine you see spark across the plug electrodes.
As for fuel, trace the fuel pipe coming into the carbureter and disconnect pipe and have someone turn engine .Petrol should gush out showing that the petrol pump is working.

Posted on Oct 14, 2008

  • myad51 Oct 16, 2008

    If spark plugs and coil are O.K then that only leaves spark plug leads or the ignition module.

    I think ingition would be elctronic ignition. The most probable culprit would be ignition module.

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