318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
1999 M-Sport For Sale
12-31-2023 05:10 PM
Last post by Coop540iT
03-23-2024 06:39 PM
1 Replies, 98,692 Views
Once again 318ti owner...
03-20-2024 12:39 PM
Last post by two30grain
03-22-2024 02:04 PM
1 Replies, 61,545 Views
What brakes do I...
03-20-2024 03:27 PM
Last post by huirtera
03-20-2024 03:27 PM
0 Replies, 58,926 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 06-14-2010, 10:32 PM   #1
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default Rough idle - yes I searched

As the title states I've read all that I could on the rough idle but still not 100% what im after. As you can guess my car has a rough idle but to an extent also continues as I drive. I can barely feel it as im driving. Almost like a slight shimmy or something. As I sit and idle its an in and out rough feel. Ny finace says she dosnt notice it but I do. The hotter it is outside the less it does it. This morning at around 70° it was slightly more noticable than this afternoon at around 90°. Just seems smoother as it gets hotter outside. Ive checked all hoses and replaced the plugs. Havnt gotten to the wires yet since im broke paying for my wedding. Ive pulled the PCV valve and cleaned it inside to where it was spotless. Still nothing has changed. Any ideas would be appreciated since I will be taken the 318 on my honeymoon and dont want to be stuck on the highway. Thanks in advance!!

EDIT: What im asking is that if you have had the exact same problem and replaced 1 certain sensor to solve it or made an adjustment please let me know. I hate to go and dish out a bunch of money and replace different things when all I needed was one item.

EDIT: Also, the previous owner was only runing 87 octane. I switched to mid grade and have only been useing Shell gasoline since all the others around here are garbage and stalls out other cars including my fiances. I put some seafoam in the gas in hopes of cleaning any injectors that might be clogged.

Last edited by Bobtail_Bimmer; 06-14-2010 at 11:11 PM.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-14-2010, 11:01 PM   #2
Platanos
Senior Member
 
Platanos's Avatar
 
Join Date: May 2005
Location: PA
Posts: 1,906
iTrader: (5)
Default

I'm no expert but I kinda had a rough idle issue too. Not as you describe but nonetheless, I check my spark plugs to find oil with every plug, after changing them, the idle was smooth as can be. Now, it starting to act up again because I haven't solved the issue (valve cover gasket). Plan on doing that this weekend.

Hope that helps a little!
__________________
Platanos is offline   Reply With Quote
Old 06-14-2010, 11:08 PM   #3
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

LOL I was just reading about the oil on your plugs. My car is not leaking oil and when I changed the plugs the old ones were clean. They were worn but useable. I just make it a point that when I buy a used vehicle that I change all fluids, plugs, wires, ect. I just get real anal about how my cars run and this is driving me crazy. It should be smooth and purring like a kitten!! Thanks for the heads up though.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-15-2010, 06:06 AM   #4
pdxmotorhead
Senior Member
 
Join Date: Mar 2005
Location: Portland Or
Posts: 2,666
iTrader: (1)
Default

Vacume leaks.

Take the rubber air tube between the throttle body and the air flow meter off, and clean it, you'll likely find little cracks in the bellows, its like 29 bucks at the dealer and raises hell when it wears out.

Dave
__________________
Dave - PDX
1995 318ti - Active Black and Tan.
2005 330xi - Mtech 1 - 6spd - Orient Blue/Black
pdxmotorhead is offline   Reply With Quote
Old 06-15-2010, 10:35 AM   #5
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

That was one of the first things I checked and I did find some cracks. I used a rubber epoxy and sealed them up for the time being. Guess I should look at replacing. Thanks.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-16-2010, 10:49 AM   #6
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Anyone else? Ideas? New boot was not the issue.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-16-2010, 05:24 PM   #7
ti_guy
Member
 
ti_guy's Avatar
 
Join Date: Feb 2006
Location: Montreal
Posts: 63
iTrader: (0)
Default

There's a tiny vac hose that makes a 90 degree downwards comming out from a tube from the upper intake in the front. It's so small that perhaps you may be missing it ot it got unplugged.
ti_guy is offline   Reply With Quote
Old 06-17-2010, 01:20 AM   #8
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Thanks ti. I will go and double check that!
Bobtail_Bimmer is offline   Reply With Quote
Old 06-17-2010, 03:43 PM   #9
colacan
Member
 
Join Date: Mar 2010
Location: chicago
Posts: 42
iTrader: (0)
Default

check the hoses and check the belts, my belt went bad and it gave an impression of rough idling when it was just really a noise making me paranoid lol
colacan is offline   Reply With Quote
Old 06-17-2010, 11:25 PM   #10
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Thanks for the response. Belts were checked first thing and its not a sound. Its an actual feel. I believe I might have found it. There is a hose running from the back of the upper manifold to the idle controle valve that is cracked. I didnt catch it on my first inspection since its hidden pretty good. Local BMW dealership says they will have the hose for me by Monday. Guess I will see if its the culprit once it arrives.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-24-2010, 12:14 PM   #11
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Just a heads up to those not in the know. Im sure all the verterans here have either delt with it or know about it. I found that one thing and it was a hose that runs from the back of the upper intake manifold directly underneath it to the idle controle valve. I have the M42 if your wondering. Takes less than an hour to replace if you know what your doing. Just remove one end of the hose that runs from the PCV valve, remove your intake boot then your upper intake manifold. Try not to lose or damage your IM gasket or just replace it while you are there. You dont have to disconnect everything from the IM. Just move it enough so that you can get under it. Be sure to put everything back and dont over torque your bolts. That simple.
Bobtail_Bimmer is offline   Reply With Quote
Old 06-30-2010, 09:36 AM   #12
keoniti
Junior Member
 
Join Date: Jun 2010
Location: Honolulu, Hawaii
Posts: 7
iTrader: (0)
Default

see if this will work

http://forums.bimmerforums.com/forum...d.php?t=454501
keoniti is offline   Reply With Quote
Old 07-03-2010, 11:50 PM   #13
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Nice link. Thanks!
Bobtail_Bimmer is offline   Reply With Quote
Old 07-04-2010, 10:11 PM   #14
keoniti
Junior Member
 
Join Date: Jun 2010
Location: Honolulu, Hawaii
Posts: 7
iTrader: (0)
Default

did mine ....

changed the two hoses connecting to the icv
changed the hose from the engine valve cover to pcv valve
sprayed the icv with throttle body cleaner and lightly brushed

engine does run smoother...
Attached Files
File Type: pdf DSC02108.pdf (1.38 MB, 377 views)
keoniti is offline   Reply With Quote
Old 07-06-2010, 01:46 PM   #15
Bobtail_Bimmer
Senior Member
 
Bobtail_Bimmer's Avatar
 
Join Date: Apr 2010
Location: Roanoke, VA
Posts: 472
Vehicles
iTrader: (1)
Default

Quote:
Originally Posted by kidashley25 View Post
I get rough idles on cold mornings but my M will smooth out after 20- 30 seconds of warm up at idle. I would check the rubber intake boot that goes to your intake manifold they tend to dry rot and split on the bottom if you have any holes or cracks in it it would cause your car to run crappy.


___________________________________________
K&N 63 SERIES AIRCHARGER COLD <link removed> AIR INTAKE KIT
I already replaced the boot with a new one. All it ended up being was a hose running from the back of the upper IM running to the ICV. After I fixed that it was fine. I went back yesterday and pulled the ICV and cleaned per the suggestion above for good measure.

Last edited by 1996 328ti; 09-07-2010 at 02:34 AM. Reason: link removed
Bobtail_Bimmer is offline   Reply With Quote
Reply

Bookmarks


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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough Idle, Tried Everything, what about this.... bmw318ti95 Engine 13 07-10-2014 01:30 AM
Rough Idle? DeadpaN Knowledge Base 12 10-07-2012 08:26 PM
rough idle ??? central09 Engine 1 05-12-2008 02:52 AM
my idle is rough need help! 95 TI jobimmer Engine 9 12-20-2005 11:46 PM
Bad Rough Idle Please Help!! chaison Maintenance 5 10-27-2004 03:04 AM


All times are GMT +1. The time now is 05:53 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2024, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 124.27 k/148.20 k (16.15%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.