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 12-15-2014, 01:43 PM   #1
MarkoHF
Registered User
 
Join Date: Apr 2014
Location: Skopje, Macedonia
Posts: 13
My Ride: Nothing
Misfiring when engine is cold

When my car is cold like mornings it misfires and it pisses me off.
After 3-4 cranks and the car finally fires up it runs fine like a clock:



That was taken in Autumn, now in winter it's worse.

CCV was changed and I was driving with burning oil for like 3,000 miles so cat might be blocked.

Spark plugs don't look burnt. They are black but not burnt.

Scan:





I don't know what to do any longer

Last edited by MarkoHF; 12-15-2014 at 01:52 PM.
MarkoHF is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 12-15-2014, 01:50 PM   #2
mwt330i
Registered User
 
Join Date: Nov 2011
Location: Western MA
Posts: 61
My Ride: 2004 330i 6speed
How long has it been since the ICV was cleaned/replaced ?
mwt330i is offline   Reply With Quote
Old 12-15-2014, 01:52 PM   #3
MarkoHF
Registered User
 
Join Date: Apr 2014
Location: Skopje, Macedonia
Posts: 13
My Ride: Nothing
Quote:
Originally Posted by mwt330i View Post
How long has it been since the ICV was cleaned/replaced ?
No idea, I own this car for 5 months.
MarkoHF is offline   Reply With Quote
Old 12-15-2014, 02:45 PM   #4
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,123
My Ride: '06 330CiC, '03 M5
I am guessing this is a 4 cylinder engine???

We do not have many of these in the US/North America.

The first real code is for a faulty Diff pressure sensor, if it is plugged in, then I assume it may need to be replaced?

http://www.ecstuning.com/Search/Engine/ES2641334/

http://realoem.com/bmw/showparts.do?...94&hg=11&fg=40

The 274E Misfire detection, Checksum failure might be a kiss of death, might be just an extraneous error? I have never seen this code before, so I cannot comment on it much. Usually anything that states "Checksum Error or Failure" often means a corrupt RAM module, but I would discount this for now.

As for the other misfires, probably either weak fuel pump or intake/crankcase air leak?

Suggest a smoke test, search YouTube for Scotty Smoke Test, do what Scotty does or make a tester from a related video.

You can check the first 2 links below in my signature for some other ideas, there may be some differences between your engine and what we typically deal with here in North America.
__________________
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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299

Last edited by jfoj; 12-15-2014 at 02:47 PM.
jfoj is online now   Reply With Quote
Old 12-15-2014, 03:55 PM   #5
MarkoHF
Registered User
 
Join Date: Apr 2014
Location: Skopje, Macedonia
Posts: 13
My Ride: Nothing
Quote:
Originally Posted by jfoj View Post
I am guessing this is a 4 cylinder engine???

We do not have many of these in the US/North America.

The first real code is for a faulty Diff pressure sensor, if it is plugged in, then I assume it may need to be replaced?

http://www.ecstuning.com/Search/Engine/ES2641334/

http://realoem.com/bmw/showparts.do?...94&hg=11&fg=40

The 274E Misfire detection, Checksum failure might be a kiss of death, might be just an extraneous error? I have never seen this code before, so I cannot comment on it much. Usually anything that states "Checksum Error or Failure" often means a corrupt RAM module, but I would discount this for now.

As for the other misfires, probably either weak fuel pump or intake/crankcase air leak?

Suggest a smoke test, search YouTube for Scotty Smoke Test, do what Scotty does or make a tester from a related video.

You can check the first 2 links below in my signature for some other ideas, there may be some differences between your engine and what we typically deal with here in North America.
Dammit well, it can probably be a vacuum leak. I mean I do hear weird noises when I start it ticks clicks high pitched sounds.

Can the Diff pressure sensor cause the misfiring?

Also idle of the car goes below 500 when I am braking putting the car to neutral etc.
MarkoHF is offline   Reply With Quote
Old 12-15-2014, 04:03 PM   #6
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,123
My Ride: '06 330CiC, '03 M5
Check the power brake booster for leaking as well.

http://forum.e46fanatics.com/showthread.php?t=1057387

Smoke test is the easiest way to find most vacuum leaks, but often does not work for the brake booster due to the input check valve blocking smoke from entering into the booster.
__________________
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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299
jfoj is online now   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 07:26 PM.


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