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Which Knock Sensor????
I am in the middle of doing an intake refresh on my 1990 S4 (cat) in the hope that this will help sort out the idle problem I have. I have found some things that need replacing right away such as the two knock sensors.
There seems to be two knock sensors you can buy. One had a black connector (with tin contacts and one a blue connector with gold plated contacts. Will either of these work on my car. Any help would be great as there seems to be a price difference between the two!
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