Question about 2000 Audi A4

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Engine stops while driving & engine revs high between gear change

Hi,

Hope someone can help. I have a B5 A4 1.8 (20 valve) non-turbo, manual.

The car has started stalling (engine stops) at any time, today it happened while going 100km/h on a highway. Sometimes it happens while idling at traffic lights... complealty erratic. The car won't restart until about two minutes have passed, thereafter it runs perfectly again. I had a workshop run a diagnostic on it some time ago and it returned a fault code about the 'master relay'. How do I locate this relay, or could it be something else?

Secondly, and possibly unrelated to the above, my car revs high between gear changes, but only after it has been running at least 15 minutes. If I switch off the ignition and restart, the problem clears until another 15 minutes pass.

Thank you to anyone who can offer some advice.

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  • iamdieter Nov 28, 2008

    Hi,



    Yes, new plugs not long ago (5000km). But the problem existed pre this change of plugs. It just never happened previously while going at spped on a highway... so obviously concerns me much more now.



    Thnx

  • iamdieter Nov 28, 2008

    Hi Dave,



    Thnx, I'll try that. Can the sensor just be removed or does the oil need to be drained to do this?



    Thank you

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Hi i am dieter
im dave

here is something to try
keep some cold water with you and the next time it happens very quickly get out and pour the water on the crankshaft sensor then restart. If it starts right away without the usual two minutes than you will need to change this sensor. The sensor is easy to find you will see a wiring harness around the crankshaft pulley(the large one at the bottom the basically runs all your accessories like the p/s pump, alternator, water pump). Try to famaliarize yourself as to the location of the sensor first so that you can try to restart it within about 30 seconds.

Posted on Nov 28, 2008

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Hi, were the spark plugs ever replaced in the car recently ?
As when they get old & hot they can cause these sorts of problems & also cheap brand plugs as well do the same.

Posted on Nov 28, 2008

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