Question about 2000 Audi A4

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Car starts but revs for a few seconds with lots of black smoke and then cuts out have disconected exhaust from manifold but no change

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Is this a diesel TDI PD ?? If so i had the same problem with one of these TDI engines and traced it to the crank sensor signal implausable. The revs would start increasing with no pressure on the throttle, lots of black smoke and then cut out. The crank sensor wiring was at fault in this case. The ECU didnt know where the crank position was in relation to the camshaft and was guessing when to inject the fuel. Hence the black smoke ! Hope this is of some use.

Posted on Nov 08, 2010

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