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My 1994 Nissan SENTRA smokes when I accelerate from a stoplight. How can I determine if this is due to faulty valve oil seals or an oil ring. I removed the sparkplugs and all seem to have oil on them? The smoke is "blue".

Answers from the Automotive Experts

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Michele, Blue smoke on acceleration means bad piston rings. Bad valve seals would be seen on deceleration. You can confirm this by doing a compression test. Good Luck. Lori Johnson

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