HELP!! sparknock on 82 buick 3.8 v6


Old 07-26-08, 11:48 AM
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Smile HELP!! sparknock on 82 buick 3.8 v6

I have a 82 cutlass with a 3.8 and it has bad sparknock.I was using 87 octane fuel,i have added octane booster it helped but it still has a slight knock.I have also tried 89 and higher octane fuel but it runs the same.I have moved the distributor,to try to solve the prob but it didnt help any.So i have set it were it runs the best.It knocks the worst when its warmed up.Do you have any ideas on what else i can try.THANK YOU....
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Old 07-26-08, 02:02 PM
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Your EGR valve is not opening or the ports are clogged.
Happens (Happened???) a lot on the 3.8A carbed Buick engine
Left alone, I've seen holes in pistons and much head damage
Old 07-26-08, 07:19 PM
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You set your timing with a decent light right? If not you should get it done to make sure the spark is close. The guess method isn't very accurate.

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