1993 chevy 350 knocking sound during acceleration

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Feb 2, 2013 | 5:14 AM

fubarbigtime

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Joined: Feb 2013

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1993 chevy 350 knocking sound during acceleration

If I retard the timing, the noise goes away but I lose power. Sounds like octane ping but louder than I remember. Any help would be greatly appreciated.

Feb 2, 2013 | 11:14 AM

oldchevy

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Joined: Apr 2012

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From: Miami, FL.

Try using a higher octane gas for a tankful to see if the problem goes away.

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