Spark plug keep going bad – Ford F150 2004

2004 Ford F-150 5.4L 3V

spark plugs keep going bad in same cylinders. Already changed coils and injectors.

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Anthony H3 weeks1 Answer19 viewsMember0

Answer ( 1 )

  1. Hello

    How does the spark plug look when you are taking them out?
    If they are black at the tip, it could be because the car is running rich and killing the spark plugs.

    It could also be caused by an oil burning inside the cylinders. You can often see signs of burned oil on the plugs then. Any trouble codes if you read the trouble code memory?

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