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Can running lean cause knocking?

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Game Over

15+ Year Contributor
1,267
1
Jun 30, 2004
Aston, Pennsylvania
I have a '97 GS-T, with a 50-trim, and every supporting mod except injectors.

After a clutch install, the battery was dead, and erased the AFC settings, the car was driven about 5 miles with the settings zeroed out.

The car is experiencing knock from the engine now. I think it is rod knock, and I can't afford a new engine. The EGT's must have gotten very hot, because my A/C fan melted a little.

My question is, can running your car extremely lean for this short of a time, cause rod knock?
 
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