E46 330i bank 1 & 2 lean - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

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!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Thread Tools Search this Thread Rating: Thread Rating: 1 votes, 5.00 average. Display Modes
Old 10-26-2012, 03:27 PM   #1
Registered User
Join Date: Apr 2012
Location: Katy Texas
Posts: 32
My Ride: 330i
E46 330i bank 1 & 2 lean

Hi guys I been having this problem for a while and I saw many people yelling me its the oil separator so I whent ahead and replaced that with all the vacuum hides that are connected to that and the canister but the problem is still there has any body run into the same problem? If so how did you resolved it.
Nicks330i is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-26-2012, 03:29 PM   #2
Registered User
Join Date: Dec 2006
Location: asheville NC
Posts: 1,502
My Ride: 99 328i, 07 z4 3.0
Search for jfoj, he has a comprehensive thread on such codes and there's a lengthy discussion. Could be Disa, could be a tear in the intake boot, could be a lot of things.
Brinkley is offline   Reply With Quote
Old 10-26-2012, 03:29 PM   #3
Mango's Avatar
Join Date: Mar 2006
Location: Southern California
Posts: 26,618
My Ride: Lexus
Two systems are the likely culprits for these codes:




Address both. See sig, click 3rd link entitled JFOJ, do it. Hit the back button, see sig again--do it all!

Mango is offline   Reply With Quote
Old 10-30-2012, 12:04 AM   #4
Registered User
Join Date: Apr 2012
Location: Katy Texas
Posts: 32
My Ride: 330i
After reading the post I'm deff testing the disa valve does any body know how to test the engine vacuum purge valve?

Sent from my HTC_Amaze_4G using Bimmer App
Nicks330i is offline   Reply With Quote
Old 10-30-2012, 04:36 AM   #5
Registered User
Join Date: Aug 2008
Location: PNW, City of Rain
Posts: 525
My Ride: 2004 ZHP 6 SPD
I had the same codes and it was my lower intake boot was torn and had a vacuum leak.
BMWCCA member #407674
ZHPMafia.com member

Ebay headers | 3.38 diff | 2.5" cat-less exhaust | K&N intake | AA stage 1 software | UUC stage 1 light flywheel and clutch | UUC Evo 3 ssk
Bimmerguy82 is offline   Reply With Quote
Old 10-31-2012, 03:15 PM   #6
Registered User
Join Date: Apr 2012
Location: Katy Texas
Posts: 32
My Ride: 330i
Well I just replaced this items
Upper and lower intake boot
Oil separator and hoses that connect to it
Vacuumhose that connects the intake and the canister
And replaced the fuel filter

After that I turned on the car spray some carb and choke cleaner to make sure I didn't miss anything and today I reseted the check engine light well see what happens. I'm hoping this fixes the problem other wise I'm looking into the Disa or the vaccum valve that's under the front of the intake manifold.

Sent from my HTC_Amaze_4G using Bimmer App
Nicks330i is offline   Reply With Quote
Old 12-12-2012, 12:43 AM   #7
Registered User
Join Date: Apr 2012
Location: Katy Texas
Posts: 32
My Ride: 330i
Ok getting back to me problem after replacing the intake hoses, PCB and all the vacuum hoses I still have the lean codes so I switched my idle air control valve but I'm still getting the codes, oh I forgot I tested the disa valve and it was good

When I start the car it idles righ but the I get sporadic idleing would it be the fuel pump, I was maybe thinking the jet sucking valve that is connected to the brake booster, intake hose and the back of the intake or might it be the valve that is under the intake right behing the oil filter housing.

Any suggestions?????

Sent from my HTC_Amaze_4G using Bimmer App

Last edited by Nicks330i; 12-12-2012 at 12:44 AM.
Nicks330i is offline   Reply With Quote
Old 12-12-2012, 05:20 AM   #8
OEM ///Member
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 23,183
My Ride: 330CiC, M5, X5, E93
See 2nd link below in my signature for fuel pump issues, however, if you are getting your CEL at idle, then you problem is not likely a fuel pump issue.

You have missed a problem somewhere unless you or someone have replaced the MAF with a non OE style MAF.

If you have a scan tool that reads out fuel trims, this would be helpful.

Intake path or crankcase air leaks are your likely problem.

You have to methodically check and change most of the plastic and rubber parts out. Did you replace the lower CCV oil return hose that connects to the dip stick?

Did you check to make sure the CCV side vacuum port was plugged if you did not need the port?

Did you check all the hoses under the rear of the intake?

Did you check the DISA and replace the O-ring?

What codes are you specifically getting and when does the CEL come on, idle or cruising? Do you get any misfire codes as well?
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Censor is ON

All times are GMT -5. The time now is 02:40 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.