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Old 01-11-2010, 12:43 PM   #1
sproule905
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unusual vibration when car is warm

I've noticed this more now when my car is warm.. car is a 99 328is - 5 spd. 182kms... Anyway, the RPM is normal, but when i stop i feel a chugging vibration and the whole car shakes.. nothing like its going to break down. I stepped outside and heard the chugging sound from the exhaust.. could my cat be toast? drive shaft bearings gonzo's? something is just not right... tear...

anyone with any reccomendations is greatly appreciated!

Thank you!!
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Old 01-11-2010, 12:57 PM   #2
T.Dot_E30
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Engine mounts are known to cause some vibrations, but i'm not sure about the chugging, it may or may not be related.
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Old 01-11-2010, 01:45 PM   #3
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best to take it in for an inspection to check out what it's doing.
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Old 01-11-2010, 03:42 PM   #4
sproule905
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take apart the drive shaft? i can hear the chugging through the exhaust, but like I said the RPM gauge doesn't reflect this. i'm a little lost/confused here.... IF you can't already tell... hmmmmm
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Old 01-11-2010, 11:00 PM   #5
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Don't think it would be driveshaft related as it does it when car is stop and the driveshaft is not moving. Check your intake boot for vacum leaks. When you give it gas you will hear a whistle under the hood. If you have a bad vacum leak it will do this at idle but could go away once your accelerating. My 325is was doing the same thing. Fixed a vacum leak and all is good.
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Old 01-11-2010, 11:02 PM   #6
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heh. Vanos.
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Old 01-12-2010, 12:02 PM   #7
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Don't tell me its the Vanos!!! oh good god!! I know that's $$$

i'll check for vacuum leaks.. like I said.. engines idles normal.. but I hear a chugging sound when stopped in traffic... it does have a nice groggle when I give it gass however..

now finding the leak is the question.....

thanks for the suggestion
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Old 01-13-2010, 09:48 PM   #8
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Chugging vibration at idle, chugging sound from exhaust? Sounds like you may have a failed ignition coil.

Is the check engine light on?

Get it checked out.

Mark.
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Old 01-14-2010, 11:07 AM   #9
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yea the check engine light is on! i plan on taking it in over the weekend. Ignition coil - what are we talking in terms of $$? parts/labour?

thanks!!!
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Old 01-14-2010, 11:12 AM   #10
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hmm bmmr specialist has them for $66. wondering if I would need 6....

DAMMIT!!
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Old 01-14-2010, 04:34 PM   #11
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Why don't you get a 30-dollar obd I/II scanner from princess auto and read the check engine code. That would take a lot of the guess work away I guess...
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Old 01-22-2010, 02:27 PM   #12
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hey guys/girls,

just wanted to follow up with this. I had a buddy scan my car and cylinder 2 was the fault code. check the plug and the electrode was toast. put the coil from cylinder 2 onto cylinder 1 and still recorded fault in C2 - so i purchased new plugs and all is well - check engine light gone!

i still noticed a small studder, but it is time for a new O2 sensors and fuel pump!

thanks for all your inputs!!
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Old 01-22-2010, 03:17 PM   #13
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^^happy to hear it was nothing serious
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Old 01-22-2010, 07:24 PM   #14
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I was low on gas and speeding at the same time< dumb

when I got home my 98 328is started sounding unsual it had symptoms like engine viberation, bubbly exhaust noise and loss of power.

Things that I would have to do before I put the car back on the road this summer

fuel filter
fuel pump
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Old 01-23-2010, 10:15 PM   #15
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DISA folks!!! Had the same issue with my 2004 Xi and just founf the air leak around the DISA seal. It`s 4 x 6 `black box mounted to Intake Manifold. Basically, you have an airleak in the take side. Take some cobustion chamber cleaner and spray liberally around all the intake pipes and tubes. Where there is a leak, the spray will be sucked in and the car will either accelerate or bog down (depends where the leak is)..... I had 3 leaks;

Top intake pipe (1st one after MAF)
Bottom intake pipe (hole in small secondary tube leading to Idle Speed Sendor)
DISA (final leak; fixed pipes still had bad idle).....

Both the seal and the control flap in the DISA were bad. FIXED DISA (bet that`s never been done b4) and changed seal...... Car runs better than I recall in ages..... as good as when I bought it or better (obviously bought used)....... Also check bottom pipe from PCV valve assemble (common probem; heat destroys pipe).......

Remember to use the combustion chamber spray, will save you hours of searching!!!! Also remember to use ONLY on the intake (cold) side of the engine. Combustion chamber cleaner is flamable; don`t spray on or near exhaust manifold or exhaust pipes!!!! On my 330Xi it was necessary to remove splash guard around ECU and Master Brake cylinder to cleanly remove DISA (not required for smaller engines).

Last edited by nachos23; 01-23-2010 at 10:19 PM.
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