Question about 2004 Chevrolet TrailBlazer

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Oil in spark plugs

My 2004 Trailblazer has 102K miles on it and has been running rough. I have run several tanks of fuel injector cleaner with no help. Changed spark plugs this weekend and found oil in #'s 2, 4, and 6. Does this mean my engine is going?

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  • swallace Jan 12, 2009

    What are some of the things I should be looking for to figure out which is the problem or do I just need to take it in for service?

  • swallace Jan 13, 2009

    The car is idling fine but when you accelerate it sounds terrible. It sounds like a "spark-knock" which is the reason I was changing the spark plugs but changing them did not help the problem. I can't feel any vibration from the "spark-knocking" but it sounds bad. It seems worse when the engine is cold or when driving up a hill but it is there all the time.



    I'm not having any problems starting the car. The car sounds normal when I start it and when it is idling.





    Thanks!

  • swallace Jan 16, 2009

    Any suggestions?

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  • 39 Answers

Could mean a variety of things.....
Possible head gasket leak....(cheap fix if caught early)
Possible Worn piston rings
possible valve guide oil seals

Posted on Jan 12, 2009

  • AnswerMan007
    AnswerMan007 Jan 13, 2009

    How does the car idle and drive.....?
    Any hot or cold starting issues?

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