I've seen faulty new sparkplugs and faulty new condensers (yes I am that old) whn I've been working on cars in the past.

Andy wrote:Ask Racer38 about spark plugs!

To be fair, ask Racer38 about anything that involves wielding a spanner and you're likely to get an "interesting" story or two.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread