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Old 11-10-2012, 02:07 AM   #1
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Join Date: Nov 2012
Location: Australia
Posts: 55
My Ride: M-Sport 320Ci e46
Rough Idle and Drive, Help!?!

So this morning I'm driving to work, I'm sitting at the lights and my car begins to shake pretty badly. It's idling very rough when it's in Drive and Reverse when I have my foot on the brake, also idles rough in Neutral and Park but not as bad as D and R. When accelerating there's a slight loss of power and continues to get that same rough feel as when it's stopped. Not a clue what it could be, there is no warning lights on the dash at all? Maybe spark plugs need replacing?

Thoughts anyone????
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Old 11-10-2012, 05:25 AM   #2
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Join Date: May 2011
Posts: 1,607
similar problem last month. Replaced plugs, coils and fuel filter. Good as new.
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Old 11-10-2012, 10:56 AM   #3
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Join Date: May 2012
Location: Melbourne
Posts: 80
My Ride: 325ci
Mine was doing the same thing. Ended up being the airflow sensor metre.
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Old 11-10-2012, 04:18 PM   #4
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Join Date: May 2010
Location: Canberra, Australia
Posts: 190
My Ride: M3 E46
My first guess would be the coil packs. But always easiest starting with the simple stuff like your Airflow sensor - just pull it out and spray the mass air flow cleaner on it. If you are mechanically adept, then you can follow this diy on the coil packs;

SOLD - 2002 M3

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Old 11-11-2012, 08:02 AM   #5
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Join Date: Oct 2012
Location: Australia
Posts: 18
My Ride: 318i
Mine shakes in idle due to the rear shocks being soft. Haven't got around to it yet
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Old 11-11-2012, 08:45 AM   #6
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Join Date: Aug 2012
Location: Melbourne
Posts: 31
My Ride: 323ci
i had the same issue, got my spark plugs replaced, oils and filters, runs like a dream now
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