Quote:
Originally Posted by AdamE53
I just ordered one from Amazon, will be here by Wednesday. I currently have the maf unplugged because it's running better without it....
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What fuel trim readings are you getting without the MAF sensor plugged in? or is it just feeling better (a seat of the pants impression)? I've been monitoring my trims everytime I've turned the X5 on, since summer of '21, though not with the MAF unplugged. I might try that soon, because I've become worried about my current fuel trims' trending toward the upper end of the scale, not towards zero, which would be ideal.
I posted a photo (see post #11
https://xoutpost.com/1228927-post11.html of what my fuel trims were last December, after finally installing the Cheap MAF, passing inspection, and finally after getting a few miles at highway speeds (Italian tune-up), that brought my trims down to a comfortable level, and my overall fuel mileage up
Since then, I've only driven the X5 a few times, seemingly at the worst times for traffic, and at the low speed stop & go cycle that made my fuel trims rise before. And today, I did a shopping trip (four stops, 15 miles total) where the long-terms rose from about +6 (they were already that high from the previous 3 trips over 3 months) to a +10 on both banks, as I parked it at home.
I used Torque Pro (which was displaying the data on my Android tablet, as usual) to check for any fault codes, or emission problems, but it found nothing. I'll scan tomorrow with my Foxwell for the same, and observe live data as well, and if nothing shows up, I'll try the laptop with INPA (still learning how to use it, so ??? results are expected). If I find nothing obvious, I'll take a three-step approach to learn more, and/or get better readings.
- 1) remove the cheap MAF, clean it with MAF cleaner, reinstall it, and read the results. If readings improve, then problem is solved. If not, then
- 2) I replace it with the unused cheap MAF I just bought, and again, if readings improve, the problem is solved, or
- 3) leave the MAF sensor unplugged, and see if my M54 will run decently without it, and see if the fuel trims get better.
Of course, this happens "just as I was extolling the virtues of the cheap MAF". It could be unconnected to the MAF itself, but to either my driving patterns being abusive to a good engine's health (slow speed, stop & go, lotsa inactivity), or to an underlying problem I've yet to put my finger on, after almost 18 months of trying. The X5 never misses a beat, starts easily, no misfires or driveability problems, nothing at all. I'm pretty sure you'll have better luck finding your problem....