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A component of the ignition system that, by induction, creates the high voltage required by the spark plugs.

5 votes
1 answer
3k views

Do I change all four coils when I change one spark plug that is faulty

My nephew changed my spark plugs and coils. I have a 2011 Buick Regal and one of the spark plugs blew when I started it, so he removed it and replaced it with an old Prius spark plug. I would like to …
Deborah Reid's user avatar