knocking on acceleration


Old 01-18-02, 06:05 AM
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knocking on acceleration

I have a manual 96 geo metro. 3 cylinders, I think 1.0 liter. It has been making a knocking noise when I accelerate for quite awhile now. The idle has also been varying. Going from a high idle to a low idle every so often. It has overheated in the past, and I've changed the fan assembly. Other than basic maintenance, nothing else has been done to my car. Any ideas on what's wrong with it? Thank you!
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Old 01-19-02, 01:50 PM
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Does the knock actually sound like a pinging? Does it go with the engine RPM or speed?

Has the oil pressure been checked with a test gauge? How is the EGR system? Does the vehicle pass state inspection? What are the numbers?

etc, etc, etc.

Maybe anything from carbon buildup to an engine ready to go south .

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