It's easier to find out what's going on if you have a scan tool you can look at the short term fuel trim that's will tell you what the ecu is telling the motor to do(add or take away fuel) depending on if your running lean or rich. This should help eliminate a few variables
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Stillen G3, z1 Intake Manifold, Stillen Headers, Z1 HFC's, Stillen Catback. 330whp 267 ft- lbs tuned at Z1 motorsports.
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