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Overheating? Under load could be a bearing Needs higher octane fuel Timing too far advanced

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โˆ™ 2007-05-16 21:50:35
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Q: What makes a engine knock sometimes in a 1998 cadillac with a 4.6?
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What are the knock senors for on a 2004 Chevy truck 4x4?

Severe spark knock (pinging) can damage the engine. Knock sensors detect spark knock (pinging) in the engine. They send that info to the ECM (Engine Control Module). The ECM makes temporary adjustments in engine timing to eliminate the spark knock.


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