Xoutpost.com - View Single Post - experimental MAF reset switch: which circuit to interrupt? more complications

workingonit · #45 04-09-2025, 07:25 PM

from 2/1/25

Quote:

Originally Posted by X5chemist

...I'll send you the OEM MAF today. Please let us know how it works....

and

Quote:

Originally Posted by workingonit

...I'll inform you of the results after testing with your OEM MAF, in this thread. Got my fingers crossed!

update from 3/15/25

Quote:

Originally Posted by workingonit

...I haven't been driving much at all, during the last six months (except for a couple of trips to the ranch, at 80+ miles each, and a few short trips to the store, inspection station, and the tax office (voting and car registration renewals), due to:
1) my wife loves driving her Lexus more than riding in my X5 (seats are too hard!),
2) I was really sick from Xmas until just recently, and would sometimes get into coughing fits, so I thought it wise to not drive at those times, and
3) I tore the Piriformis muscle in my hip, on Dec.23, and because it affected my walking, it was followed by peroneal tendonitis in my leg (both on my right side), so it is uncomfortable (to say the least) to sit and drive.

update from 3/22/25

Quote:

Originally Posted by workingonit

...About the OEM MAF: I have only made one very short drive in the X since you sent me that MAF (thanks again!). I've been pretty sick since mid-December, and also had a lot of pain with my right leg (popped the piriformis muscle in my hip, also in mid-December, and that caused a resultant strain in the peroneal tendons) so I have trouble sitting straight up in the seat to drive.

My illness has now passed, and I'm getting used to the pain in my hip & lower leg (can walk without a cane, again), so I can drive again.

During the short trip earlier, the fuel trims seemed to be slightly better than previously seen, but I haven't driven enough miles for the trims to equalize, yet.

I plan to drive the X next week, and see what the MAF does on a longer test drive circuit (including a highway component), that I follow when getting stubborn emissions monitors to set.

Ok, I finally drove the X5 again today, only the second (very short) drive since I received the OEM MAF in February. Total miles under 25. My bad hip & leg problems have made me a passenger, until today, when I HAD TO go get some gas for the mowers (old Dixon zero turn, Husqvarna push, Cub Cadet push string trimmer) while the wife was out and about doing wife crap. Need to cut the wilderness out front (lotsa grass and a drainage gulley with a full jungle in it).

The hip and leg problems will not keep my wife from insisting I cut the gulley, while she gets to operate the zero turn riding mower, so I will probably remain in pain for the foreseeable future; but as far as driving/testing the OEM MAF goes, I'll just have to see how it goes, too.

I don't see any long distance driving oppportunities in store, so if I'm to give the OEM MAF a fair test, I'll just have to do a long test drive, for test's sake, only. But, the two short trips so far have shown the LTFT's between 3.12 and 7.2, with STFT's doing a balancing act. Nothing has radically changed from past results.

G/S is still nominal, and O2 readings show a lazy reaction to throttle inputs, as usual. I even tried a full throttle acceleration from 10 mph (first ever in the X5, for me, aware that my transmission is quite elderly), and only then did I see larger Short Term numbers, and faster O2 reactions. Not sureif that's good or bad.

Hopefully, I'll get on the mend this summer, and finally find what's been ailing my X5, as well. Stay tuned.

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