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!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 04-08-2010, 06:15 PM   #1
Bdubbin
Registered User
 
Join Date: Jul 2009
Location: lockport il
Posts: 87
My Ride: clean e46
Vanos symtom ?

I bought my 00 323 with 69k Im currently at 86k and I think its vanos time but i need some advice to be sure. Its been happening recently when i start it up(engine dead cold) The Idle is very rough and the rpms fluctuate about 1100-800 for about 15 sec and it goes back to perfect idle. If i drive right away it hiccups occasionaly till warmed. I have a k&N 57 intake and i can hear when i go wot it isnt a smooth roar its kinda sloppy. No codes and it feels a little slower. Ive done some searching it seems like vanos just need some final input on my symptoms before i replace the seals. Thanks in advance. Btw i did a major tune up around 72k so thats out of the question. oops forgot the p in my title

Last edited by Bdubbin; 04-08-2010 at 06:17 PM.
Bdubbin is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 04-08-2010, 06:19 PM   #2
ChasCan
Registered User
 
Join Date: Jan 2010
Location: Connecticut
Posts: 1,066
My Ride: 2001 330xi
Have you checked your air inlet tube after the MAF, right where the tube elbows off to the CCV. They like to crack there & it would cause the same symptoms you are describing. Chas
ChasCan is offline   Reply With Quote
Old 04-08-2010, 07:00 PM   #3
Bdubbin
Registered User
 
Join Date: Jul 2009
Location: lockport il
Posts: 87
My Ride: clean e46
But wouldn't the false air entering the intake be a problem all of the time?
Bdubbin is offline   Reply With Quote
Old 04-08-2010, 10:41 PM   #4
TOURING
Registered User
 
TOURING's Avatar
 
Join Date: Nov 2004
Location: North West Florida
Posts: 521
My Ride: M3 Vert/M5/M3 coupe
yes
__________________
TOURING is offline   Reply With Quote
Old 04-08-2010, 10:53 PM   #5
Toad21
Registered User
 
Join Date: Feb 2009
Location: Normal IL
Posts: 893
My Ride: 00' 328CI
OK here is your test.

1. On a cold morning, start your car, and watch the rough idle kick in, then turn off the car.
2. Unplug your vanos electrical connector. Its to the right of the vanos, on the driverside of the engine near the top (search for DIY on this)
3. Start your car again, and watch the idle be perfect


This means its your vanos. If you unplug the vanos electrical connector and the idle stays rough, then its not he vanos.

Simple as that.
__________________
Toad21 is offline   Reply With Quote
Reply

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 01:54 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use