I've noticed a decrease in the performance of my Audi A3 and suspect it may be due to a faulty spark plug. What are the steps I should take to troubleshoot and fix this issue?
ReplyThe first step is to confirm if the spark plug is actually faulty. You can do this by removing it and inspecting it closely for any signs of wear, such as corrosion or fouling.
If the spark plug appears to be faulty, the next step is to replace it. Remember to use the correct type and size of spark plug for your Audi A3.
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