I was wondering if I could lean each rpm value up by 1% to help my gas mileage? Til atleast I get my wideband and datalogger.

 

It won't do anything at 1%, and some rpms are already lean, while others are rich. You need to see the effects of your settings before guessing on them. Even with my richness tuned out by the S-AFC, I see no difference in MPG, though.

 

thats because most of the tuning that the safc is capable of is just erased over time. The stock ECU learns out the part throttle changes. So while you could decrease you fuel at say 4000 rpm to try and attempt a high gas mileage map, the ecu will just make up the difference as its trying to reach stoic.