I just found and repaired an intake air leak in 1 of the supercharger by-pass hoses. I did a hard reset and logged my short and long term fuel trims on a 10 minute drive (idle to full throttle, 0- 65 MPH variation. I am wondering if they are in line with the 2001 supercharged engine with 118K miles


- Average short term Bank 1 = 1.85
- Range for short term Bank 1 = -19.23 to +14.94
- Average long term Bank 1 = 1.52
- Average long term Bank 2 = 1.61
Note: bank 2 short term must not have been selected to log


Do these values look OK?


Thanks for any feedback

 

You need to drive more than 50miles to get real fuel trim values. ECU requires enough time for adaptation after reset. Do not make any WOT during adaptation. It's not safe.

 

Thanks XJR-99. I had no idea about avoiding WOT until adaption is complete

 

I would say below say 3 LTFT on both banks is good, especially since you have those 200 cell cats.

Stock, I am running in that neighbourhood.