Car shaking like crazy under acceleration, no cel, what is it? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 06-12-2009, 06:41 AM
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Car shaking like crazy under acceleration, no cel, what is it?

I have done a new fuel filter and egr canister for the hell of it, new throttle postion sensor, but car still running like crap. anywhere between 20-25 mph car starts to buck and shake uncontrollably under acceleration, but in neutral sounds smooth. I have no check engine lights, so apparently sensors are good. fuel pump doesnt make sense considering car starts and drives. anyone have this or similar issue? thanks!!!
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#2 (permalink) Old 06-12-2009, 02:52 PM
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check under the car too

if it's not the engine mounts then surely it has to be that thing on the drive-shaft, forgot what it's called but bmw likes to use them. made out of rubber so they go bad every 10 years. ~$80

technically it would still be spinning if in neutral but without load.. so smoother?
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#3 (permalink) Old 06-14-2009, 09:03 PM
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yeah...you could have a bad guibo....that's sounds about right..either a guibo or a propelor shaft bearing.....
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#4 (permalink) Old 06-14-2009, 09:19 PM
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actually a guibo joint is kind of cool to replace.....there's like 6 bolts/nuts running back toward the end of car and 6 pointing towards the front of the car.....total balance....and strength I would reckon as well.....this was on a 3.3 litre...maybe there aren't that many on 2.5....anyway...yeah...if it shudders upon acceleration and then settles down I would guess the guibo joint...they are not that expensive...maybe around $80 for the part...this is something you can do yourself if you can replace a muffler on your own.
It's a very important part to replace as well, it's my best advise that you just go ahead and look at the drive train components...
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