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Is Oil on Spark Plugs a Serious Issue & What Causes It?

RepairSmith

Consequently, your vehicle will run rough, or you may experience engine backfire. Note: When there’s a misfire, your vehicle’s ECU will trigger the check engine light and register a related code such as P0300 , P0301 , P0304 , etc. If you’re not comfortable with car parts, let a mechanic handle this job for you.

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