A tip from @
Kodename47 in this thread:
http://www.ft86club.com/forums/showt...=114760&page=3
Splitting this topic out in its own separate thread.
My MAF is pretty well scaled and produces consistently low fuel trims. However, I had some curls in the critical 3-volt section that I couldn't get rid off, presumably because of AVCS.
My MAF looked like this:
After a bit of fiddling with the OL fuel table (moving a row and rescaling + adjustments), off I went for a drive:
I had brought my laptop. Pulled over, uploaded to datazap, did some adjustments in RomRaider, flashed, and did another pull:
The OL fueling table looks like this:
I'll sacrifice another row and move things a bit around, so I can put in another point to make the first part of AFR command more pointy to counter the dip.
It was a bit scary to flash the car while pulled over some random place. And moving rows around in OL fueling I preferred to do at home. So I am not done yet.
Before anyone says it's too lean, keep in mind this is without learning - just flash and go. The entire AFR curve moves down where it should be once the ECU learns the fuel trims. Usualy I end up with +1-2 after very little driving.
I just wanted to share my experience for anyone wanting to take this route too. I'm done messing with MAF. As long as it's a nice exponential curve and produces low LTFTs I think this is an easier way to bring AFR into line.