Question about 2005 Mazda 6
Changed from 87 to 89 octane which has not helped.
Try de-carboning the engine, I would suggest you use the dealer's brand of chemical to do this, follow the instructions on the can, also check for any computer trouble codes, if no codes and still knocks after cleaning then you may have a connecting rod bearing issue.
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
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