E-39 sucking air - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 12-20-2010, 09:01 AM
n00b
 
Join Date: Aug 2008
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dan Kelliher is on a distinguished road
(Thread Starter)
E-39 sucking air

2002 525i with 122k. Started out with an intermittent stalling and rough running. Replaced fuel filter. No help. Found crack in lower intake boot. Replaced and helped. Scanning tool showed o2 sensors out of range. Replaced both on exhaust manifold. Still getting codes. Cleaned MAF. No help. Sprayed cleaner on hoses and around intakes. Engine revved up, so now I know I have a secondary problem. Get the revving when I spray above the box that is wired to the MAF sensor and mounted towards the front of the engine under the intake manifold. I know that the tube from the Vanos in the front of the engine is in the area behind the box, but don't know what else is in there as I cannot see behind the box. I think that the icv is mounted towards the front of the box in the same area, but moving it around after sliding it off the mount does not affect the engine idle. Since I need to take out the air box to get in there, I want to have parts to replace what is in there and giving me the air leak. Cannot find anything in the Bentley manual that shows this area. Can anyone help me please?
Dan Kelliher is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-21-2010, 05:50 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
Welcome to the Werkz.

Have a look at the exploded diagrams on the RealOEM.com Online BMW Parts Catalog it may give you some insite into the parts behind this box you are referring to.
I found a decent vacuum leak between the plastic interface that sits between the intake manifold and the throttle body. Fixing that up helped with the fuel economy as well as stabilising the performance.
If you aren't doing this already, use a nozzel on the carby cleaner spray can to focus on very localised areas.
Good luck


Riding in style

Last edited by brettski; 12-21-2010 at 05:53 AM.
brettski is offline  
#3 (permalink) Old 12-23-2010, 03:17 PM
n00b
 
Join Date: Aug 2008
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dan Kelliher is on a distinguished road
(Thread Starter)
Thanks Brettski. Turned out to be a hole in the vent hose down to the dipstick which I could see after pulling out the air box and all the intake stuff. Local parts couldn't get me parts till noon, so I ended up at the dealer for parts. Was only going to replace one hose, but a tech explained they had a kit to replace everything and explained how to do it. He was right to replace everything as the parts are plastic and everything was very brittle and broke when I tried to do anything with them. Took around 6 hrs to do everything (my neighbor helped with the connecting line into the new valve and with the intake boot on the throttle body-the only things I had major problems with). Figured I saved $ 500 as the tech said they charge 4 hrs min. for the service. I have some experience as a DIY guy, and this one for me was 4 wrenches out of five. Purrs like a kitten, runs like a lion.
Dan Kelliher is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold air intake air filters oxox43 5-Series (E12,E28, E34, E39, E60) 2 10-16-2010 12:30 PM
321i, 2001 Heater doesn't blow hot air - only cold air - greatly appreciate help tkaustin 3-Series (E46, E90) 9 01-12-2010 11:25 AM
I love my 530, but her M54 is sucking oil! arbuckle@rochester.rr.com 5-Series (E12,E28, E34, E39, E60) 7 09-14-2009 08:42 PM
NEW Replacement Air Flow / Air Mass Meter Muddy 3-Series (E36) 1 07-18-2009 04:23 AM

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

 
For the best viewing experience please update your browser to Google Chrome