Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
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
  #11  
Old 05-18-2019, 02:43 PM
Member
 
Join Date: Apr 2006
Location: PA
Posts: 460
Scott ZHP is on a distinguished road
Quote:
Originally Posted by Oldmactech View Post
Ok, so I swapped mine into hers and it ran fine, was not connected to intake hose, just laying on top of the filter.
Reconnected it to the X5, not connected to the hose, ran fine. Put it in the hose and immediately died. I’m hearing lots of vaccum “whoosh” from the throttle body. Maybe ICV bad? Was pretty dirty when I pulled it, no rattle. Rattled a bit when I reinstalled.


Sent from my iPad using Tapatalk
Be certain you don't have an obstruction somewhere in the intake plumbing. The MAF has a rubber sealing ring on the throttle body side, and two more on the plastic collar that connects the rubber intake boot to the hard plastic intake "muffler" tube. Make sure these aren't lodged somewhere between the throttle body and the MAF itself.
__________________
12 E70 3.5i xDrive
03 E46 330i ZHP
01 E53 3.0i
98 E36 323is
12 Audi A4 Quattro
79 Triumph Spitfire
73 MGB
Reply With Quote

Sponsored Links

  #12  
Old 05-18-2019, 03:02 PM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 271
Oldmactech is on a distinguished road
Thanks.

Will probably disassemble some of that and check all the connectors. May have left the ICV electrical disconnected or something. I started it up with the MAF connected but not in line. When I put it inline that car stalled and I could feel vacuum when I reinstalled. Also, don’t feel any vacuum at the oil filler.


Sent from my iPad using Tapatalk
Reply With Quote
  #13  
Old 05-18-2019, 05:00 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,434
andrewwynn is on a distinguished road
MAF out of the air path will send very confused signal to the car (basically not getting any air = max rich mix).

Did you check your fuel trims and fuel pressure yet?


Sent from my iPhone using Tapatalk Pro
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #14  
Old 05-18-2019, 05:04 PM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 271
Oldmactech is on a distinguished road
Will hook my scanner up later but there is plenty of fuel pressure just by touching the Schrader valve.

Not sure how you test the fuel trim?


Sent from my iPad using Tapatalk
Reply With Quote
  #15  
Old 05-18-2019, 05:06 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,434
andrewwynn is on a distinguished road
First time start after headgasket not so good.

You have to measure not just squirt. You can use a tire pressure gauge (I would just use a less than favorite one in case gas messes with the seals inside).

Fuel trim read with scanner. Short term fuel trim and long term.
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #16  
Old 05-19-2019, 10:06 AM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 271
Oldmactech is on a distinguished road
Won’t stay running with the MAF sensor inline. If I disconnect the MAF of remove it from the intake tube to get it running, will the fuel trim numbers be valid?


Sent from my iPad using Tapatalk
Reply With Quote
  #17  
Old 05-19-2019, 11:09 AM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 271
Oldmactech is on a distinguished road
Update: put my wife’s e46 MAF in the e53, smaller opening so I had to ductape it to make a decent sale. Ran fine. One symptom is hers causes a stall when I disconnect it, mine does just the opposite and stalls when I connect it.


Sent from my iPad using Tapatalk
Reply With Quote
  #18  
Old 05-19-2019, 02:33 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,434
andrewwynn is on a distinguished road
Run with her MAF and get some fuel trim readings. I suspect fuel pressure problems
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #19  
Old 05-19-2019, 02:38 PM
Member
 
Join Date: Oct 2018
Location: Atlanta
Posts: 271
Oldmactech is on a distinguished road
I will later. What’s the cure for bad fuel trim?


Sent from my iPad using Tapatalk
Reply With Quote
  #20  
Old 05-19-2019, 02:59 PM
bcredliner's Avatar
.1 decrease 0-60 time = $1000 & DIY
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 6,913
bcredliner is on a distinguished road
Whenever you have a problem that you didn't have before you did work always check your work first and thoroughly. Always believe there are no coincidences, that something else
does not happen togo wrong while the vehicle was torn down.

When the MAF is disconnected the engine runs on stored maps to determine correct air/fuel ratio. That the reason it runs fine with the MAF disconnected. That doesn't mean the MAF is bad. First troubleshooting I would do is check for a vacuum leak or air getting into the engine after the MAF.
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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 08:21 PM.
vBulletin, Copyright 2019, 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.