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 08-01-2011, 12:45 PM   #1
EXNoodle
Registered User
 
Join Date: Mar 2006
Location: Albany, NY
Posts: 151
My Ride: 330CI
Send a message via AIM to EXNoodle
Start-up idle issues

Did a lot of searching and could not find a fix for my idle issue.

It only occurs at start-up only, but randomly, regardless if the engine is warm or not.

At startup, this is what happens:
-Engine will not start
-Push on the gas while turning the key & engine will startup, but idle rough feeling like its running on half the cylinders. A srong smell of gas comes out of the tial pipe as well.
-Push on the gas again for a second, the engine reves up to 1500 rpm's and the idle corrects itself and runs smooth with no further issues.

I am thinking it is not a lack of gas, or spark, rather an issue of air at start-up. I have a hunch its the ICV or Throttle position sensor on the throttle body.

I have already done my Vanos, CCV upgrade, fuel filter, spark plugs, cleaned my MAF, DISA & ICV. I have a 117K on the car.


Anyone have any ideas on how to trouble shoot to determine what is causing the porblem?

Thanks you all in advance for your input!
__________________
Gray 2004 330CI ZHP
EXNoodle is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 08-01-2011, 01:15 PM   #2
Zchild
Registered User
 
Join Date: Mar 2006
Location: Columbia, Maryland
Posts: 1,774
My Ride: 2000 BMW 3XXi ZSP
Just a suggestion but it sounds as if one of you vacuum lines from your secondary air pump has a vacuum leak or is crimped. Just my two and a half cents worth...
__________________
V/R Zachary Pullins Sr.
National Capital Chapter BMWCCA
NCC Member Recognition Chairman
NCC High Performance Driving School Back-Up Registrar
NCC Auto-X BOD Liaison
DIY Senior Committee Coordinator
2006 E90 325Xi & 2000 E46 3XXi
" Vision without resources is just hallucination"
Zchild is offline   Reply With Quote
Old 08-01-2011, 02:41 PM   #3
EXNoodle
Registered User
 
Join Date: Mar 2006
Location: Albany, NY
Posts: 151
My Ride: 330CI
Send a message via AIM to EXNoodle
Thank you Zchild. I will take a look at that tonight and double check.
__________________
Gray 2004 330CI ZHP
EXNoodle is offline   Reply With Quote
Old 08-01-2011, 03:18 PM   #4
EXNoodle
Registered User
 
Join Date: Mar 2006
Location: Albany, NY
Posts: 151
My Ride: 330CI
Send a message via AIM to EXNoodle
any other ideas?
__________________
Gray 2004 330CI ZHP

Last edited by EXNoodle; 08-01-2011 at 03:22 PM.
EXNoodle is offline   Reply With Quote
Old 08-01-2011, 03:23 PM   #5
Drewfus2101
Registered User
 
Join Date: Jan 2009
Location: Huntsville, AL
Posts: 626
My Ride: '03 330i
Is the CEL on? Does it do it only on initial startup, or will it act up when you're idleing at a light?

If it was your ICV, it would probably act up all the time, and not clear up after a minute or two. That makes me think it's a sensor problem. If you can get it scanned, it might show if one of the sensors is out of it's normal parameters.
Drewfus2101 is offline   Reply With Quote
Old 08-01-2011, 04:11 PM   #6
EXNoodle
Registered User
 
Join Date: Mar 2006
Location: Albany, NY
Posts: 151
My Ride: 330CI
Send a message via AIM to EXNoodle
The CEL have never turned on, even when the engine idles rough at start-up.

It only occurs at start up. Never at a light.

I understand your logic, that it could be a sensor. Throttle position sensor maybe?

By scan, do you mean with my Peake Tool or another tool or maybe at the dealership.

Thank you for your input Drewfus2101.
__________________
Gray 2004 330CI ZHP

Last edited by EXNoodle; 08-01-2011 at 04:12 PM.
EXNoodle is offline   Reply With Quote
Old 08-08-2011, 12:54 PM   #7
alpine325coupe
Registered User
 
Join Date: Dec 2010
Location: Bethpage NY
Posts: 638
My Ride: 2004 M3 SG/IR
Not sure if this was said, but did you check your intake boots for cracks? And cleaning your MAF will only help if it functions properly. Once the MAF is bad it needs to be replaced. I always start with the cheapest things first, so check intake boots before anything.
__________________


Mods: OEM MTech II, Tein Super Street Coilovers, Rogue RSMs, Alcantara wheel, Depo p46, smoked corners, clear sidemarkers, LED taillights, matte black grille, Meyle HD FCABs, 35% tints
alpine325coupe is offline   Reply With Quote
Old 11-14-2012, 07:52 AM   #8
EXNoodle
Registered User
 
Join Date: Mar 2006
Location: Albany, NY
Posts: 151
My Ride: 330CI
Send a message via AIM to EXNoodle
Finally solved.... http://forum.e46fanatics.com/showthr...600&highlight=
__________________
Gray 2004 330CI ZHP
EXNoodle 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 11:49 PM.


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