Frantz

My 2010 is running a canned diablo sport 93 oct tune and I noticed the left bank seems to be running richer than the right. I cleaned off both exhaust tips inside to reconfirm and the left banks is getting dirty faster. Any thoughts?

GT John

I would suspect that the front left bank o2 sensor may have failed or reading incorrectly. The best way to find out would be to datalog the STFT's (short term fuel trims) the left bank, if failed, would read rich < 1.0 and the right bank would read >= 1.0 (+/- .05)

It is always advisable to put the car on a dyno to confirm that the canned tune is delivering the expected results HP/TQ and A/F.

jerjan

Ditto on the O2 sensor. I see you have an off road pipe. Some have had trouble with the flanges sealing properly on them. This allows air into the exhaust that can give an incorrect reading to the computer. In severe cases it can take out the O2 sensor also.