Help me fix my idle! - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 02-22-2007, 03:30 AM   #1 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 25
Photos:
Matty is an unknown quantity at this point
Help me fix my idle!

So i have been having a couple issues with my 85 318i.

First i replaced my head gasket and while putting it back together and reattaching the throttle cable i noticed (or thought) the cable seemed loose. So i adjusted the nut on the threaded part at the end of the cables cover. You know, not on the throttle body but where the cable's sheath ends at that bracket. The Bentleys says not to adjust this (I think) so i have since moved it back to where i think it was.

I put it back because the car was getting really jumpy at low rpm and kinda jumped through acceleration. It still does it but only slightly. How do i make sure it is where it should be?

Also i replaced my O2 sensor yesterday, i dont know how old it was. It seemed to run great after. But today while i was driving the idle started to get higher and higher each time i stopped, and then would be fine, then at another stop was high again. It went as high as 2000. I think thats as high as the icv will send it if its bad. How can i tell if it is the icv? Could the timing not have been set properly if the o2 sensor was bad? I have only timed it by ear because i dont have a timing gun (yet!). Any help would be great
thanks
-David
Matty is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-22-2007, 04:39 PM   #2 (permalink)
5th Gear Member
 
Join Date: May 2004
Location: NC
Car: Opening soon:
Posts: 1,118
Photos:
Starmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the rough
Test your throttle position switch first.
Starmavin is offline   Reply With Quote
Old 02-22-2007, 07:58 PM   #3 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 25
Photos:
Matty is an unknown quantity at this point
I can't find how to test that in the Bentleys, where is it?
Matty is offline   Reply With Quote
Old 02-22-2007, 08:20 PM   #4 (permalink)
5th Gear Member
 
Join Date: May 2004
Location: NC
Car: Opening soon:
Posts: 1,118
Photos:
Starmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the rough
On your throttle body. There you will find a three wire plug, unplug it and you'll see three terminals, the center is the common, you should have continuity between the center and one of the outer ones at closed throttle, then at wide open throttle you'll have continuity through the other and the middle.
Starmavin is offline   Reply With Quote
Old 02-23-2007, 03:21 PM   #5 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 25
Photos:
Matty is an unknown quantity at this point
I am going to check the TPS later today.

Does anyone think it could be possible that the O2 sensor i put in was bad, could it cause this to happen? Also, when i remove the vacuum line from my distributer when the engine is up to temperature nothing happens and i thought something was supposed to. I am quite lost on this one. I keep trying to adjust things but it either has no effect or it makes it worse.
Matty is offline   Reply With Quote
Old 02-24-2007, 01:44 AM   #6 (permalink)
5th Gear Member
 
Join Date: May 2004
Location: NC
Car: Opening soon:
Posts: 1,118
Photos:
Starmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the roughStarmavin is a jewel in the rough
The O2 has no effect on idle that would cause your symptom, it only tells the computer if the car is running lean or rich, that way the computer can make adjustments, the worst thing would be if you blew a fuse, however I'm sure that your O2 isn't heated so no worry there. The vacuum line to the distributor controls timing advance at higher engine speeds and load. At idle there will be no change if you disconnect the vacuum line...
Starmavin is offline   Reply With Quote
Old 02-24-2007, 04:18 AM   #7 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 25
Photos:
Matty is an unknown quantity at this point
Thanks for all the help. As always the true cause of the problem is never as nefarious as one thinks. The ground wire that bolts to the intake came off. It seems that it runs the ICV because now it hums away and the idle stays steady. It needs to be adjusted but hopefully that shouldnt be an issue.
Matty is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E21, E30)


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Erratic Idle / Misfire / Cutting out makdolby 3-Series (E36) 12 02-05-2012 07:57 AM
I got a problem my BMW 1992 325i is Idle to high, can some one time how to fix that. Marco80 3-Series (E36) 2 03-07-2006 08:57 PM
Idle Problems BeelZibub 5-Series (E12,E28, E34, E39, E60) 10 07-10-2005 04:56 AM
Idle Problems '95 325is Burnettm 3-Series (E36) 3 04-26-2005 12:41 PM
Warmed up idle puzzle. nightsurfride 3-Series (E21, E30) 2 02-03-2004 08:04 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 10:06 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.