1991 suburban with 1993 tbi

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Feb 18, 2013 | 10:09 AM

fubarbigtime

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1991 suburban with 1993 tbi

Engine knock or pings during acceleration, sounds like octane? I run 93 octane fuel and still there. If I disconnect the timing lead(tan/blk wire) engine runs like new. Any help would be greatly appeciated.

Feb 18, 2013 | 5:31 PM

go-part

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It sounds like you need to play with advancing and retarding the timing of the engine while that wire is off.

Feb 18, 2013 | 5:57 PM

73shark

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Joined: Apr 2006

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From: KC, MO area

Welcome to the forum.

Need to check/set timing to spec. I doubt that engine requires premium fuel and it's just money thrown away.

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