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214 Posts
Discussion Starter #1
(1995 Caprice LT1)

Is there any way to test if your knock sensors are working? Scan9495 shows tons of knock at startup, but the count doesn't rise while driving. Normally not a problem, but at WOT under-load, I swear I am hearing it. At 80% throttle - no noise. At 100% throttle - marbles in a can, but nothing showing up on the log. The PCM isn't doing anything under "knock retard degrees" - always shows "0"

No codes. Runs great otherwise.

If I were to have the scanner open and then rap on a sensor with a screwdriver or something, would that be an acceptable test to see if they are working correctly?

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