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GM fuel trim theory and trans pids question
Posted to Technical Theory Forum on 4/15/2010 11 Replies

Ok, I checked out GMs resources tab and info on fuel trim theory. I would like to know "real-world" data on fuel trim on this model at least.

GM states that several components come into play to calculate trims. TPS, RPMS,MAP,O2 data and more affect it. I'd ... Login to read more.

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car Vehicle Data

1998 Pontiac Grand Prix SE 3.8L

Engine3.8 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

1998 Pontiac Grand Prix SE 3.8L

Engine3.8 L
Trans4-speed Automatic (Electronic)