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Spark knock....HELP!!!

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Old Aug 17, 2001 | 09:25 AM
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dash8's Avatar
dash8
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From: westmoreland n.h.
Default Spark knock....HELP!!!
I've noticed some spark knock , or detonation,, what ever it's called. normal driving car runs great to about half throttle, but when i tromp on the gas i'm getting detonation. does anyone know if the timing needs to be retarded, or what about a spark retarder. Is there a vacum advance type that would work.. ????? :confused:
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Old Aug 17, 2001 | 11:09 PM
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JAKE
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From: Kempner Texas
Default Re: Spark knock....HELP!!! (dash8)
We need to know the year of your Vette and any mods you've made.

Jake
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Old Aug 24, 2001 | 04:19 AM
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GlockLT4
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From: Dallas TX
Default Re: Spark knock....HELP!!! (dash8)
If it's a 92-96, could be the optispark... like it was for me :(. at 2500 rpm and up, HORRIBLE missing and detonation.
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