Questions tagged [spark]

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4 votes
1 answer
17k views

Do I Need to Ground the Spark Plug When Testing

When I'm using a known good spark plug to test spark at each wire, do I need to ground the threads of the plug to the engine block like the guy in this video is doing? What happens if I don't ground ...
Robert S. Barnes's user avatar
2 votes
2 answers
807 views

spark plug problem in service

I took my car in for a routine annual service at a local garage. During the service, a piece of debris from a broken spark plug fell into the engine. The garage says it was 'just one of those things' ...
David Williams's user avatar