experimental MAF reset switch: which circuit to interrupt? more complications

[workingonit]

I just came back from a short trip (25 miles, stop and go, some speeds up to 60, two destinations visited), and I observed the LTFT's starting to settle down into +3's to +4's, lower than I've grown to expect from low-speed driving. Usually, the LTFT's only fall that low during longer stretches of highway travel.

Maybe the Siemens MAF is learning and correcting the long-term incorrect fuel map? I almost wish I was still driving my 120+ mile-per-day commute to work and back, as I did until 2016 (5 years before I got the X5), just to get a new LTFT baseline, faster than my 25 miles or less a month can accomplish.

Thanks, X5chemist!

[X5chemist]

Nice! The MAF plus all your emission work adds up. Keep driving as much as you can. My aftermarket MAF is still going good. Eventually, I'll buy a back up OEM one.