BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Steve Thomas BMW
Post Reply
 
Thread Tools Search this Thread
      07-21-2012, 11:27 AM   #1
leJUNd
First Lieutenant
 
leJUNd's Avatar
 
Drives: e90 M3
Join Date: Jun 2006
Location: Los Angeles

Posts: 313
iTrader: (1)

Pinging noise? (non M3 related)

First I apologize in advance for posting a thread that does not concern M3 in M3 section but I really didn't know where else to go and this section draws a lot of traffic so I was hoping someone could help...

My gf has a 03 325i and she raised a concern about an unusual noise. Over 55mph under load, there is a slight vibration noise... the way she describes it is kind of a dinging sound...glass cup vibrating sound...
It goes away when she takes the foot off the gas and comes back when she steps on the gas again. I really don't notice it when I drive it but she definitely hears it. I suspect it's pinging.

Now... she's been putting 87octane the whole life of the car, so obviously I think refueling with higher octane and seeing if that makes any difference would be the first thing to do... but if it's not the fuel, what could it be? timing? spark plugs? what would be the next step in correcting this? should she be concerned? again it's very very slight noise... I really don't hear it but she does. Any information regarding the topic would be much appreciated.

Thanks
leJUNd is offline  
0
Reply With Quote
      07-21-2012, 03:25 PM   #2
C|3R1C
So Kewl Guy
 
C|3R1C's Avatar
 
Drives: 2010 E93 M3 DCT
Join Date: Sep 2011
Location: Los Angeles

Posts: 483
iTrader: (0)

Could be something getting loose under the car, maybe a screw fell out and a cover a vibrating a little. Happened to me once.

I could have sworn BMW needs 91, but I'm no expert on what low octane can do except for reduced performance.


But definitely try to find an external source for the sound, and narrow down where the vibration is coming from.
__________________
2010 E93 M3 / AA Catless X-Pipe / AA Catback / AA Pulley / Vorsteiner Vented Hood and Bootlid E93 Trunk / ADV1 7.1 Wheels GB / LS3 LED Lights / AFE Stage 2 / Velos Designwerks Tune
C|3R1C is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump


All times are GMT -5. The time now is 06:10 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST