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


Go Back   ZPOST > BMW Z4 Roadster and Coupe > General BMW Z4 Forum
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      06-14-2013, 09:46 PM   #1
SimpleMan
Private First Class
14
Rep
153
Posts

Drives: 04 Z4 2.5i
Join Date: May 2007
Location: Vancouver, WA

iTrader: (1)

Question Strange rubbing/humming/vibration noise on startup?

Guys,

I've got a strange low level hum/vibration/rubbing noise when I start my car. It's not very loud. It's completely random. I went out to my garage and started my car the past three days. No noise on Wed and Thur... start the car today and the noise is back. I drive it around for a little bit and it goes away. It's very noticeable when I'm sitting inside the vehicle but not when I'm outside the vehicle. I'm pretty sure it's not coming from under the hood. It seems like it's coming from below me or behind me. Could it be something with the exhaust/catalytic converter, axle, drive shaft or differential? Also, every now and then when I turn my key to position 2 (ignition switched on) I can here an electric motor sound that lasts for about a second. It sounds kinda like something is being opened or closed. Kinda like the sound when you lower the top. It also sounds like it's coming from under the car or behind me. Anyone know what that sound is? I can usually here it happen after it's been sitting for a while. If I start it and stop it after the initial start it doesn't make that sound.

BTW, the car has 19,000 miles on it.

Thanks,

Last edited by SimpleMan; 06-14-2013 at 10:00 PM..
Appreciate 0
      06-14-2013, 10:06 PM   #2
Rated M Roadster
Captain
Rated M Roadster's Avatar
160
Rep
891
Posts

Drives: F10 M5, i3, Z4M
Join Date: Jun 2011
Location: PDX

iTrader: (9)

Fuel pump
__________________

CURRENT ll F10 M5 l E85 Z4MR l I01 i3 REX
SOLD ll E70 X5M l E85 Z4MR VF570 l E36/7 Z3MR l E36 328i
Appreciate 0
      06-15-2013, 11:30 AM   #3
SimpleMan
Private First Class
14
Rep
153
Posts

Drives: 04 Z4 2.5i
Join Date: May 2007
Location: Vancouver, WA

iTrader: (1)

Quote:
Originally Posted by Rated M Roadster View Post
Fuel pump
Which noise? The noise when I turn my key to position 2 or the random humming noise?

Is it normal for the fuel pump to make a noise?
Appreciate 0
      07-08-2013, 10:32 PM   #4
a13xkim
New Member
0
Rep
25
Posts

Drives: 06 z4m roadster, 16 x5 msport
Join Date: Sep 2007
Location: NY

iTrader: (0)

I have a similar problem. But the noise paces with the rpms. Also I only noticed it the last two days when the weather here in ny has been excessively hot and humid... 90 to 100* f.
Appreciate 0
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



All times are GMT -5. The time now is 02:52 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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