spark plugs
3 Answers
its best to change all of them , but if you can only access the front plugs change the one which may be causing a code or check engine light
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Change them all, it makes no sense to do a half assed tune up. I know they are difficult to change and it costs more money, but you will be better off in the long run.
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All or nuthin. would you only put on the left side of you clothes?
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