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Re: high CO at idle 89 GMC/Chevy 7.4 TBI
Posted to Emissions Forum on 12/17/1999 2 Replies

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Hi Aaron--Note Martin Smith is the GM wizard,I have learned alot from this Master Tech,, But I have played with a few 7.4 and found that adjusting the TPS to .56 v or .60 v normally drops these into c... Login to read more.

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