Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E30 (1983 - 1991)
User Name

Welcome to!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Thread Tools Rate Thread Display Modes
Old 11-05-2013, 10:47 AM   #1
Sea Aych
2nd Gear Member
Sea Aych's Avatar
Join Date: Mar 2013
Location: Dt Toronto/Ottawa
Posts: 214
Rough idle on cold (<10 degs outside) starts for 30 seconds

Since it's starting to consistently dip below 10 degrees here, my '89 325i has started acting up a little when started. If it's below 10 degrees, the car starts up just fine, idles around 600-650, which is good, then as soon as i start to move, the idle after that starts to be extremely loopy and wants to stall, dropping down to 300-400 then jumping back up to 1000.
Only happens for about 30 seconds while i'm in first pulling out of the driveway and lane near my place in 1st and 2nd gear. Once it's up driving at at least 1500rpm for that 20-30 seconds or so it idles fine after that (engine is still cold at this point).
Never happened during the fall or summer - only really started when the temps started to drop below 10 in the past couple weeks...

Any ideas? Really don't want to start checking for vacuum leaks, but i'm going to take a look at the ICV and intake boot today after work, maybe the screw on the icv is in too far making the car "look" a little for the idle when it just starts. Who knows!


Last edited by Sea Aych; 11-05-2013 at 10:52 AM.
Sea Aych is offline   Reply With Quote
Old 11-05-2013, 11:00 AM   #2
Warlock of the century
Yamahammer's Avatar
Join Date: Jun 2010
Location: kitchener
Posts: 625
Could be the CTS for the dme. But you can also test your ICV. There are instructions on how to do this in the Bentley. The surging idle is strange, but it is not uncommon to see these things like shitty when that cold.
Yamahammer is offline   Reply With Quote
Old 11-06-2013, 09:00 AM   #3
3rd Gear Member
Join Date: Mar 2008
Location: GTA
Posts: 361
Try cleaning the ICV and lubing with light oil. It's got to be able to turn freely and if it's gummed up, it'll overshoot, and then overcorrect the opposite direction
cirrusblau is offline   Reply With Quote
Old 11-06-2013, 11:00 AM   #4
Sea Aych
2nd Gear Member
Sea Aych's Avatar
Join Date: Mar 2013
Location: Dt Toronto/Ottawa
Posts: 214
^ think it's that? It's just weird because it doesn't jump around until I move for the first time. It starts up and idles fine and if I let it sit for 20-30 seconds then start to move then it doesn't jump at all. I'll give it a look though. Thanks!

Sent from my SGH-I757M using Tapatalk
Sea Aych is offline   Reply With Quote

cold, idle, m20, rough, start

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 -4. The time now is 10:19 PM.

Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.