Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X3 (E83) 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
  #1  
Old 05-22-2023, 10:02 AM
AceEngineer's Avatar
Member
 
Join Date: Nov 2017
Location: Albuquerque
Posts: 64
AceEngineer is on a distinguished road
Question Looking for help with the exhaust flapper valve on an E83

I've got an '08 E83 and I am at a loss for information on the vacuum operated flapper valve at the root end of the tailpipe. I have the now well-known E83 rough idle and I am wondering if that vacuum line is a source of a vacuum leak causing the rough idle. I am looking for the solenoid that controls it. I am assuming that it is controlled by a solenoid somewhere because I think it is operated by the engine controller. The other possibility is that it is operated directly by manifold vacuum. In that case where is it plugged into the manifold? I cannot find any information in my Bentley Manual or in the parts breakdown at: https://www.realoem.com/bmw/enUS/select?vin=WJ09460 . Is there anybody out there that is acquainted with the location of the solenoid or have any information that can help me? Even information about when it is supposed to operate, actual vacuum source and is "vacuum on" open or closed? If I can find the solenoid I plan to plug the vacuum line there instead of at the muffler. I have crawled under the car an checked the flapper valve and it appears that the diaphragm is busted because pumping a vacuum directly on the valve just sucks air and the lever arm never moves. Today I picked up some vacuum plugs at the auto parts store and I am going to plug the line right where it plugs into the valve and see if the idle gets better. In the long run I want to plug the line right at the solenoid that controls it or unplug it if that is the vacuum off position but I cannot find it. Any help out there?

AceEngineer
__________________
2008 X3 3.0si My DD
2005 X5 4.4i Better Half's DD
Reply With Quote

Sponsored Links

  #2  
Old 05-31-2023, 07:22 AM
AceEngineer's Avatar
Member
 
Join Date: Nov 2017
Location: Albuquerque
Posts: 64
AceEngineer is on a distinguished road
Cool I found it!

It is controlled by a solenoid and it is located in the driver's D pillar(rear most). Pull the trim inside the tailgate on the left side and the solenoid is mounted in the rear against the face that the tail light is mounted to. I pulled both tubes (in and out) and with the car running I determined which was which and plugged the vacuum source line. My idle seems to have improved, but it may be a while for the control circuit to readjust. We'll see.

AceEngineer
__________________
2008 X3 3.0si My DD
2005 X5 4.4i Better Half's DD
Reply With Quote
  #3  
Old 06-13-2023, 10:39 PM
RocketyMan's Avatar
Member
 
Join Date: Jan 2020
Location: PNW
Posts: 547
RocketyMan is on a distinguished road
Nice! Good job looking at realoem.com

https://www.realoem.com/bmw/enUS/sho...diagId=18_0612
__________________
2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6
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 07:16 PM.
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.