So. I'm beginning to tune my car, I drive it to get coffee everyday, it now has an official 12 miles on it.
But I've disabled the VE tables so I can adjust the MAF. Unfortunately I can't really take the RPM's above 3,000 and I can't really get out of second gear. (I'm not on a main road)
Either way, I've got the LTFT/STFT err table for the MAF and I've got it dialed in pretty good. Seems to run well, drive well, not nearly as much off-idle hesitation as there was. But every once in a while, usually after I reset fuel trim to get another sample run, the short term (and sometimes long term) fuel trim will go APE. Like 25% both banks, both widebands pegged 10.5:1, and it almost drowns the engine out, you can feel it almost stalling.
What causes this erratic fuel suffocation?
Thanks in advance.