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Ask Your Question2002 Audi A4
Question: Bad spark plug?
Question
Engine & car suddenly started shaking at low RPMs while city driving. I just got the spark plugs replaced, so it leads me to believe one of them might have failed. My questions are:
1) Does anyone have a different diagnosis?
2) Is there a way to find out which plug is bad without buying expensive tools?
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Best Answer
backyard tech September 13, 2009, 13:03Reply
MasterYour check engine light has to be illuminated. If it is related to a spark plug you would turn on the MIL(malfunctiong indicator light) do to a misfire/misfires. Is your MIL light on?
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Answer #2
some guy November 05, 2009, 16:44Reply
Journeymanthis type of car is known for some ignition coil issues. your car will be covered by a recall for them any day now. they are soooo fragile that spark plug replacement sometimes damages them (no fault of mechanic). get the cat checked too! make sure it passes a "readiness" test
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