Question about 1986 Volkswagen Jetta

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Pinking 1986 Jetta CLX Auto. I run only on unleaded. What do I need to do to stop pinking, it sounds like a diesel tractor when accelerating especially on uphills. What grade of spark plug should I be using as this may be the problem. Also the idling is very low below 500 rpm which causes the motor to shake a little.

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Replace plug and wires.have timing checked. have detonation sensor checked also have egr valve check to make sure it opens when it suppose to.if it dont open it will cause detonation.

Posted on Jun 01, 2009

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