Question about 1991 Toyota Camry
It sounds like detonation. This occurs when the air/fuel mixture ignites in the cylinder before it should. I can be caused by incorrect timing or even red-hot carbon deposits in the combusion chamber. I would tend to belived the 2nd suggestion as cars tend to run hotter in traffic.
Try running some Marvel Mystery oil in the gas. Use the recommended dilution on the bottle. If that doesn't work, GM top engine cleaner. It can be purchased at GM dealerships. Follow the directions on the can.
Posted on Sep 10, 2009
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Posted on Jan 02, 2017
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