REVscene - Vancouver Automotive Forum


Welcome to the REVscene Automotive Forum forums.

Registration is Free!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! The banners on the left side and below do not show for registered users!

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


Go Back   REVscene Automotive Forum > Technical Discussion > Manufacturer Tech Forums > Euro Tech Resources

Euro Tech Resources All Euros (VW, BMW, Benz, Porsche, Ferrari, Lamborghini, etc) Tech info
THIS ADSPACE OPEN FOR ADVERTISEMENT

Reply
 
Thread Tools
Old 02-25-2012, 07:26 PM   #1
Where's my RS Christmas Lobster?!
 
Join Date: Sep 2004
Posts: 888
Thanked 326 Times in 112 Posts
advice needed for BMW veterans.

This is my first BMW so im not too familiar with it, if i can get some of you BMW veterans' advice that would be great.
The car is 2008 328i 28500km

So on cold start ups, the engine rpm shoots to around 1200 rpm then slowly drops to 600 rpm, like every other car, but when the rpm is dropping the rpm bounces and car shakes a little bit, once it gets to 600 rpm everything is fine, theres no rpm bounce or shake at 600 idle rpm. Theres no engine light or warning light. Car runs fine. The rpm bouces at start up only occurs occasionally. when it does happen it only happens breifly. I don't know if it's misfire or what, but is this normal, or should i bring it in?

Even though i have CPO if i bring it in and it is normal they gonna charge me 200$. Do anyone have a BT tool that can read 2008 328i error codes?
Advertisement
kkttsang is offline   Reply With Quote
Old 02-25-2012, 07:57 PM   #2
#savethemanuals
 
Join Date: May 2008
Location: Richmond
Posts: 3,978
Thanked 2,523 Times in 949 Posts
What you describe sounds normal to me. As your car warms up the revs drop slowly until it settles at idle.
__________________
987 Porsche Cayman S 6MT
Guards Red/Sand Beige Full Leather

XV30 Lexus ES300
Black Garnet Pearl/Ivory Leather
Energy is offline   Reply With Quote
Old 02-25-2012, 08:02 PM   #3
Where's my RS Christmas Lobster?!
 
Join Date: Sep 2004
Posts: 888
Thanked 326 Times in 112 Posts
Quote:
Originally Posted by Energy View Post
What you describe sounds normal to me. As your car warms up the revs drop slowly until it settles at idle.
thnx for your reply, what about the rpm bouncing while its warming up, is that normal too? or do you think it's misfires.
kkttsang is offline   Reply With Quote
Old 02-25-2012, 09:43 PM   #4
?NR
MonoPod 1 of 3
 
?NR's Avatar
 
Join Date: Jul 2001
Location: Internet
Posts: 7,260
Thanked 1,023 Times in 444 Posts
Check the mass airflow sensor and or throttle body.
?NR is offline   Reply With Quote
Old 02-26-2012, 05:35 AM   #5
2x Variable Nockenwellen Steuerung
 
Join Date: Oct 2002
Location: N49.2 W122.1
Posts: 6,176
Thanked 1,174 Times in 704 Posts
Get the car scanned, if there is really a misfire it will show up at GT1 or something similar (they are common among enthusiasts). If you are really concerned leave the car at one of the BMW specialized shops eg Nixon etc.. let them test the car during different times of the day.
godwin is offline   Reply With Quote
Old 02-27-2012, 10:27 PM   #6
I Will not Admit my Addiction to RS
 
Join Date: Aug 2009
Location: WEST VAN
Posts: 521
Thanked 704 Times in 136 Posts
Quote:
Originally Posted by kkttsang View Post
This is my first BMW so im not too familiar with it, if i can get some of you BMW veterans' advice that would be great.
The car is 2008 328i 28500km

So on cold start ups, the engine rpm shoots to around 1200 rpm then slowly drops to 600 rpm, like every other car, but when the rpm is dropping the rpm bounces and car shakes a little bit, once it gets to 600 rpm everything is fine, theres no rpm bounce or shake at 600 idle rpm. Theres no engine light or warning light. Car runs fine. The rpm bouces at start up only occurs occasionally. when it does happen it only happens breifly. I don't know if it's misfire or what, but is this normal, or should i bring it in?

Even though i have CPO if i bring it in and it is normal they gonna charge me 200$. Do anyone have a BT tool that can read 2008 328i error codes?
My car did that until the Vanos solenoid failed, and my car died in the middle of the road. If its a CPO and still under warranty they'll charge you like $50 deductible if they have to replace the solenoids.
pb.kidz is offline   Reply With Quote
Reply

Thread Tools

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -8. The time now is 08:02 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
SEO by vBSEO ©2011, Crawlability, Inc.
Revscene.net cannot be held accountable for the actions of its members nor does the opinions of the members represent that of Revscene.net