can you help identify this strange rumbling/vibration? - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 07-29-2012, 03:45 AM
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can you help identify this strange rumbling/vibration?

hey everyone,

i have a 2002 manual e46 325is with 90k and i am having a certain problem with it that is going to be hard to explain because its not exactly reproducible, and i know its going to be even harder to help understand it on a blog post...

the car has a rumble, or a stutter- a vibration that does not feel normal.
sometimes it feels like i'm driving over a thousand hoses.

when i cruise at low speed the ride is smooth. and when i gun it, sometimes it gets the rumble of a thousand hoses... this especially seems to happen if i accelerate in too low a gear. it seems to happen between 2500 and 3000 rpms... in a lower gear the vibration is way worse, but it seems to rumble even in 5th gear going 80 - its just much more subtle.

usually after the rumble happens i can smell a burning rubber smell when i get out of the car.

the problem seems to be getting worse, though i think its been going on for almost a year. i've only had the car for a year, but i don't remember if it was always there...



about two months ago i got the flex disk, drive belts, and the control arm bushings replaced...

a few weeks ago i got new tires and breaks at a different shop... they witnessed the rumbling but couldn't identify it.


when i first bought the car, there was a problem with the fuel mix, and the way the computer was telling it to inject fuel. i think it was a little too rich.


i'm going to try to replicate the rumble/vibration/stutter so i can video it and put it up here to better describe the problem.

in the meantime, if you guys have any ideas i'd like to look them over.

thanks a lot
max
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#2 (permalink) Old 01-17-2013, 08:41 PM
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I have had the same problem for a year....garage can not figure it out. Spend lots of money trying to fix the problem....
Did you find out what it was?
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#3 (permalink) Old 02-12-2013, 08:01 PM
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can you help identify this strange rumbling/vibration?

Check motor mounts first. If it is not the mm's it could be exhaust or any of the engine accessories; fan, power steering pump, etc. Any competent indy shop should be able it id the problem fairly quickly.


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