confusing LTFT's for adaptations or normal DTC's?
 

I am talking about resetting the current LTFT's (from the original MAF) to a clear status, so the X5 will go back to the "normal" fuel map, and use the new MAF as its' reference. Otherwise, it'll take quite awhile to get back to normal LTFT's (if the new MAF is actually the solution, and is measuring the airflow more accurately than the old sensor).

I did try resetting adaptations before, and the LTFT's remained the same, so the stored data isn't accessible thru the Foxwell, or so I believe. I'll try it again, but if resetting adaptations fails to set LTFT's back to zero, then I'll do the unplugging/replugging the MAF trick, to get back to zero.

I don't use the foxwell, but there are generally multiple places to reset different adaptions in DIS/INPA/ISTA. Finding the right one to reset can be a chore.

a laptop with DIS/INPA/ISTA would be nice to have
 

When I swapped for the X5, I knew that I'd need a more capable scan tool than my Innova 3100i, as I'd read about all the problems I'd be facing in the future, as I've no prior experience with BMW's. I knew I needed a bi-directional tool, which the Foxwell is, so I bought the NT510 Elite as an entry level advanced tool.

I bought it already programmed for GM vehicles, as I needed the bi-directional capability right then (it paid for itself in just a few uses on my GM cars), and the swap for the BMW hadn't happened yet (got the Foxwell in January, the BMW came in May). As soon as I received the X5, I bought the BMW programming for the scan tool. It's been quite useful, so far, but I'd like more capability down the road.

I thought I could renew/rebuild my broken '12 Toshiba Satellite 6GB ram/500GB memory laptop, so I could get INPA at the very least, but it would cost more than $300 in parts alone, and though I built a PC in 2019, I'm not sure I have the skills needed (and Best Buy quoted me a price of over $700, back in 2019, to fix it). So, for the present time, no diagnostic laptop for me.

You can usually pick up an old, perfectly adequate thinkpad in the $150 range. Frequently with an SSD already added.

Ironically, I also have a GM Foxwell. But it's sufficiently awful to use that I've never felt the urge to spring for the BMW pack when I already have a GT1 laptop and an INPA/ISTA laptop.

[QUOTE=workingonit;1220721]But, would you try a new (and recommended) non-OEM MAF just to test the possibility that your original OEM MAF might be inaccurate, and might be the cause of the bad air/fuel ratio in the first place?
No, never. I don't consider a few recommendations from folks I have no idea of their skill level or even if they really purchased an item to be verification of anything. I don't experiment with critical parts. I would troubleshoot until I determined if the MAF was the culprit. If I find it is I would only buy a new MAF that was made by the original MFG.
I sure wouldn't/couldn't rent an OEM MAF just to test with, and I would never "buy" one, test with it, and then return it to the supplier (that's outright theft in my moral code).
I wouldn't send an MAF back. Don't know where that came from.

So, after X5chemist recommended the $23 non-OEM MAF earlier, I figured it would at least tell me if my Siemens MAF (age unknown) is under-reporting the g/s airflow, and triggerering my lean codes.[list][*]1) At best, I get a solution, after which I'd buy a new Siemens MAF to use (as soon as I get the $$$ to buy it, and keep the $23 unit as a known-good spare),[*]2) second-place result, with no change or very similar to the lean codes and g/s readings I'm already getting, I've got evidence that my OEM sensor is still OK, and I've got a spare, and[*]3) worst case result, as the $23 MAF shorts out my DME, and the X5 burns to the ground, then I made a mistake and I lost $23 and my X5 (but proved those doubting the reasons to get a cheap sensor to be infallible).

If you can't be sure the $23 unit works properly it won't verify anything. Troubleshoot. Troubleshoot. Verify the source of the problem. If you are willing to take the risk of burning your X5 to the ground, that's fine. I've learned over the years that buying new parts from reputable brands is a far better route in the long run. I go through MAFs quite often because of the engine mods. I have a spare new MAF to slap in when needed. Even then I troubleshoot to verify the MAF is bad. I don't use the new MAF for troubleshooting.

response from a guy just "workingonit", trying to fix a small problem
 

[QUOTE=bcredliner;1220767]

Foxwell on BMW is completely different than the GM module which is nowhere near as helpful. Foxwell is very complete on bmw. Mine has gm, Toyota, Chrysler, BMW. BMW easily has 2-3x the functionally of any of the other modules.

Yeah I previously loosened the headliner so i knew the connection to the tray is easy to come off. I used a flexible hose and stuck that in a couple of inches before blasting at 6 bar. After that the flow was pretty good at both sides

1) I can't be sure that any MAF will work properly, so I am taking a chance on one that was recommended.
2) Troubleshooting without satisfactory answers leads me to try a new approach, i.e. "possible MAF under-reporting airflow", that wouldn't be necessary if there was data I could compare my tests to, so I am trying it.
3) No, my X5 isn't liable to burst into flames due to a MAF swap, but might be set afire if my wife catches me replacing
A) all vacuum lines,
B) intake boots,
C) fuel filter/pressure regulator/fuel pump,
D) O2 sensors,
E) SAP unit, etc.,
any of which might be the real cause of the lean codes, but which also has eluded my testing, without exhausting all other possibilities first.
4) After many years of working on cars, racing cars, and working on machinery in my job, I agree with you about reputable brands being better, but have found that you don't always get what you paid for, and sometimes trying a substitute works out. In this case, not having a supply of BMW spare parts handy, nor the money to throw at it just now, I think it is justifiable in trying the cheap part for my version of troubleshooting.

No justification of your decision needed. Was only input to consider, an opinion, and you know what they say about opinions.

And still no MAF......

A little bit longer and I'll be forced to get the all BMW all Land Rover MAF![emoji2959]

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