LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Fine tuning help

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Old 04-25-2012, 10:05 AM
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Default Fine tuning help

Hey all,

Rebuilt my motor with an LE2 H/C/I package. New opti, plugs, wires, 37lb injectors, coil, ICM, etc.

Car gets really bad mpg, about 115 miles to a tank (~8mpg!)

Solomon set me up with a baseline tune and we tweaked it a bit because of a rich condition and I am getting all sorts of strange activity. Here is his quote from our correspondence:

I’d say you have something wrong with the car somewhere, the fuel trims are acting crazy sometimes reading rich and then at idle sometimes they go very lean. Plus you’re still getting a lot of data errors which is not normal. Maybe you have some bad grounds somewhere. There’s definitely something not right in there, but I’m not a mechanic.
Not sure what is exactly causing all the data errors. Any thoughts?
Old 04-25-2012, 10:48 AM
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check your plugs. maybe the problem is specific to one cylinder.




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