What is the purpose of a knock unit and what does it do does it pertain to the oil
Aug 7, 2009 at 8:58 AM
1997 Pontiac Grand Am Knock Unit
DEBBY1964
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If you are talking about a knock sensor? It screws into a water jacket and like a microphone listens for any pinging or pre-ignition. If it detects is it will tell PCM to retard timing anywhere from 1-15 degrees, to prevent damage to engine.
Aug 9, 2009 at 1:57 AM
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