base timing on 90 GMC Suburban 5.7eng - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-07-2012, 11:18 AM
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base timing on 90 GMC Suburban 5.7eng

I would like some help on the spec on base timing on my 90 suburban with a 5.7 tbi engine. My service manual says to refer to the emissions sticker under the hood. Mine is missing. I have an idling issue, and would like this spec before I start troubleshooting. Can someone help?

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Old 01-07-2012, 01:19 PM
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should be zero degrees with the bypass wire disconnected. should be a single wire connector poking out of the wiring harness by the brake booster
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Old 01-07-2012, 08:00 PM
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Thanks for the help. Thats what I thought it should, but I wanted to be shure
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