Quote Originally Posted by Sandman View Post
I completely understand that it won't be perfect. Most of the LTFTs are fine, the LTFTs in the low RPMs are high, figured its just where I'm tuning I'm not hitting every cell.
But just remember that you are not tuning anything in the "maf" really, so you really need to be "tuning" the o2 sensor at this point and using the maf to do so.

I suggest to everyone to just leave a stock maf file in, filter out anything less than 2-4% throttle and hit your injectors by the complete average of every LTFT in a scan.... You can do this in excel quickly and easily... You are always going to have trims, there is really no way around it because the narrowband is a touchy sensor.

The way I look at the maf.. GM spent millions of dollars to have hitachi develop these sensors, as well as millions to have them write base frequency curves for them.. then they spent millions to have engineers do on car tuning of these sensors to the point that a $30 o2 sensor crammed into an exhaust pipe and a kid scanning it for 20 minutes is probably going backwards.