Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 12-03-2012, 03:11 PM
1972ford's Avatar
1972ford 1972ford is offline
Function over fashion
Location: NH
 
Join Date: Jun 2009
Posts: 774
Mein Auto: 325xiT
Clever way to check for vacuum leaks?

I've been chasing an idle surge problem for a few weeks now, although it's hardly been a priority. It's gotten cold out here in NH and I feel like it is related to the temp, but can't say for certain. The car starts normally and idles perfectly cold, then after a short drive e.g. to work, when I clutch in the idle fluctuates from 500 to 1000 and back about 8 to 10 times and then settles down to 700ish, and stays there.

I have cleaned the DISA valve and ICV and replaced both intake boots. The ICV in particular was quite dirty, and the lower intake boot was definitely cracked, but the problem is more or less exactly the same.

My research has pointed me to look for vacuum leaks, but other than visual inspection of the hoses I can see, any thoughts about how else to pinpoint a possible leak?

Thanks in advance.
__________________
Reply With Quote
Ads by Google
 

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 07:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms