Exhaust lean or rich?
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09-30-2012, 12:18 AM
1994 5.8T Cobra
565rwhp @ 10psi
Theoretically it can adversely effect fueling based on changing responce time of O2 sensors... However a tune is required on 03+ WRX/STi's due to boost control and CL/OL transition issues..... NOT whether or not the car will run lean/rich.
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