Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #71  
Old 05-21-2022, 05:22 PM
workingonit's Avatar
Member
 
Join Date: May 2021
Location: DFW Texas
Posts: 527
workingonit is on a distinguished road
addendum to last post(s); maybe problem solved?

I have just tried and failed to reset the long-term fuel trims by the Foxwell "reset all adaptations" method, twice, over thirty minutes. I had run the engine up to operating temperature, and followed the steps indicated on the Foxwell, but no success.

I went inside for awhile, then started the X5 up again, then after operating temp was reached, I paid particular attention to the MAF readings, which were pretty steady at 5.8-6.0 g/s at idle (much better than the old MAF's 4.1-4.5 g/s). I raised the rpms to about 1800 for about 3-4 minutes, and saw the long-term fuel trims fall to 7.8% on both banks (from 10.2% on bank 1, and 10.8% on bank 2). I watched for another 10 minutes at varying rpms, but the LTFT's remained at 7.8%. I had never seen them fall on their own, before the new (cheap) MAF was installed.

I am sure that longer use by driving would make the LTFT's fall further, but growing impatient, I got out and unplugged the MAF until it stalled and set a DME code. Then, I plugged it back in, returned to the X5, cleared the new MAF code, and ran the engine another 30 minutes. Here's a photo of what I saw:
Name:  zeroed ltft and 6.0 reading on maf.jpg
Views: 91
Size:  217.1 KB

I'm happy now, but only more driving and time will tell if my lean code problems are truly gone. Switching to a new MAF seems to have worked.
__________________
'01 BMW X5-E53 3.0i (born 7/13/01)
topas-blau, Leder-Montana grau,
my new favorite project car

Plus four GM vehicles: 2 Daily Drivers, and 2 modified trucks (for hauling & camping):
3 Chevys:
'09 HHR Panel LS 2.2L,
'08 Cobalt Coupe LS 2.2L,
'04 Silverado 2500HD WT Reg. Cab
+ a '98 GMC Sierra 1500 Ext. Cab

- and 20 others, now gone, that I've had over the last 58 years (not counting the stillborn "1965 ChevyII altered/gasser project")
Reply With Quote

Sponsored Links

  #72  
Old 05-23-2022, 02:23 PM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,024
X5chemist is on a distinguished road
Back from a short trip, wow. Lots of conversations.
Keep it going. Hopefully it works out.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #73  
Old 05-24-2022, 12:50 PM
workingonit's Avatar
Member
 
Join Date: May 2021
Location: DFW Texas
Posts: 527
workingonit is on a distinguished road
so far, so good

Quote:
Originally Posted by X5chemist View Post
Back from a short trip, wow. Lots of conversations.
Keep it going. Hopefully it works out.
I've only got maybe an hour runtime on the new, cheap MAF, but so far, so good.

While actually driving the X5 (about 22 miles this morning), the LTFT's % are starting to move around a bit (from -3.12 to +0.78) but soon go back to zero. Meanwhile, the STFT's have ranged from -7.12 to +3.12, but stay mostly the opposite (+/-) of the LTFT's (making their composite total nearly zero). The MAF values go from 4.1g/s (lowest I've seen, at 745 rpm) to 36++g/s momentaily on acceleration, with a very fast response time.

Time will tell what the end result will be, but I've never seen it display negative long-terms before. I sure hope my lean codes stay away, but also that they're not replaced with rich codes!
__________________
'01 BMW X5-E53 3.0i (born 7/13/01)
topas-blau, Leder-Montana grau,
my new favorite project car

Plus four GM vehicles: 2 Daily Drivers, and 2 modified trucks (for hauling & camping):
3 Chevys:
'09 HHR Panel LS 2.2L,
'08 Cobalt Coupe LS 2.2L,
'04 Silverado 2500HD WT Reg. Cab
+ a '98 GMC Sierra 1500 Ext. Cab

- and 20 others, now gone, that I've had over the last 58 years (not counting the stillborn "1965 ChevyII altered/gasser project")
Reply With Quote
  #74  
Old 05-24-2022, 12:53 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 9,784
andrewwynn will become famous soon enough
I still have my original Siemens brand MAF that was working fine when I replaced it. (Big oversight I could have swapped when I gave the car to the insurance co. )
__________________
2011 E70 N55 (me)
2012 E70 N63 (wife)
Reply With Quote
  #75  
Old 05-24-2022, 01:00 PM
workingonit's Avatar
Member
 
Join Date: May 2021
Location: DFW Texas
Posts: 527
workingonit is on a distinguished road
I'm hanging onto my Siemens MAF, also

Quote:
Originally Posted by andrewwynn View Post
I still have my original Siemens brand MAF that was working fine when I replaced it. (Big oversight I could have swapped when I gave the car to the insurance co. )
If the cheap new MAF continues to work advantageously to my benefit, it will remain in place on the engine, but if it doesn't solve the lean codes problem afterall, then the Siemens MAF goes back on (but I'll never be sure if it is good, bad, or iffy).

I wish you had kept yours, and you could've rented it out for testing purposes.
__________________
'01 BMW X5-E53 3.0i (born 7/13/01)
topas-blau, Leder-Montana grau,
my new favorite project car

Plus four GM vehicles: 2 Daily Drivers, and 2 modified trucks (for hauling & camping):
3 Chevys:
'09 HHR Panel LS 2.2L,
'08 Cobalt Coupe LS 2.2L,
'04 Silverado 2500HD WT Reg. Cab
+ a '98 GMC Sierra 1500 Ext. Cab

- and 20 others, now gone, that I've had over the last 58 years (not counting the stillborn "1965 ChevyII altered/gasser project")
Reply With Quote
  #76  
Old 05-24-2022, 01:04 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 9,784
andrewwynn will become famous soon enough
My old one worked exactly the same as the new one. I was chasing some odd trim issues that were likely just worn out cat so I am suggesting as you said loaner for diagnosing but also say your knock off works perfectly for a month and craps out. Mine is just sitting on a shelf and doesn't fit in either of our new x5s so I would send to anybody that could use it.
__________________
2011 E70 N55 (me)
2012 E70 N63 (wife)
Reply With Quote
  #77  
Old 05-24-2022, 01:39 PM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 3,024
EODguy is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
My old one worked exactly the same as the new one. I was chasing some odd trim issues that were likely just worn out cat so I am suggesting as you said loaner for diagnosing but also say your knock off works perfectly for a month and craps out. Mine is just sitting on a shelf and doesn't fit in either of our new x5s so I would send to anybody that could use it.
Sheeeeee-it I wish I was stateside!

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #78  
Old 05-24-2022, 02:04 PM
workingonit's Avatar
Member
 
Join Date: May 2021
Location: DFW Texas
Posts: 527
workingonit is on a distinguished road
I misunderstood your post

Quote:
Originally Posted by andrewwynn View Post
My old one worked exactly the same as the new one. I was chasing some odd trim issues that were likely just worn out cat so I am suggesting as you said loaner for diagnosing but also say your knock off works perfectly for a month and craps out. Mine is just sitting on a shelf and doesn't fit in either of our new x5s so I would send to anybody that could use it.
So you meant that you would send it to me? as a loaner? or gift or purchase? Sure, to any of the above! If you say it's good, then your stellar reputation assures it to be so.

I think I'd trust a proven Siemens MAF over the cheap replacement, in the long run, but for right now, I'll keep testing with it. Until it (probably) craps out.

Please PM me what arrangement you'd like, so I might acquire your MAF, on your terms. Sounds perfect for a cross-check of different MAF characteristics, a comparison that I have looked for online for quite awhile, and not found.
__________________
'01 BMW X5-E53 3.0i (born 7/13/01)
topas-blau, Leder-Montana grau,
my new favorite project car

Plus four GM vehicles: 2 Daily Drivers, and 2 modified trucks (for hauling & camping):
3 Chevys:
'09 HHR Panel LS 2.2L,
'08 Cobalt Coupe LS 2.2L,
'04 Silverado 2500HD WT Reg. Cab
+ a '98 GMC Sierra 1500 Ext. Cab

- and 20 others, now gone, that I've had over the last 58 years (not counting the stillborn "1965 ChevyII altered/gasser project")
Reply With Quote
  #79  
Old 05-24-2022, 03:02 PM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,024
X5chemist is on a distinguished road
Keep posting data. Once I get mine back, I'll compare information.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #80  
Old 05-25-2022, 09:34 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 9,784
andrewwynn will become famous soon enough
Quote:
Originally Posted by EODguy View Post
Sheeeeee-it I wish I was stateside!

Sent from my SM-A730F using Tapatalk

Mine is from m54 wouldn't help you.

I think I do have one from an m62 which might actually be the same and it might take forever but can't I ship using afp?
__________________
2011 E70 N55 (me)
2012 E70 N63 (wife)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 12:57 AM.
vBulletin, Copyright 2023, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.