Rough Idle and Drive, Help!?!

f4n4tik · 11-10-2012, 01:07 AM

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????

Constantine · 11-10-2012, 04:25 AM

similar problem last month. Replaced plugs, coils and fuel filter. Good as new.

Kstrooch · 11-10-2012, 09:56 AM

Mine was doing the same thing. Ended up being the airflow sensor metre.

Honro · 11-10-2012, 03:18 PM

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;

BrownEye · 11-11-2012, 07:02 AM

Mine shakes in idle due to the rear shocks being soft. Haven't got around to it yet

Dennis323 · 11-11-2012, 07:45 AM

i had the same issue, got my spark plugs replaced, oils and filters, runs like a dream now

11-10-2012, 01:07 AM	#1
f4n4tik Registered User Join Date: Nov 2012 Location: Australia Posts: 51 My Ride: M-Sport 320Ci e46 View My Garage	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????

11-10-2012, 04:25 AM	#2
Constantine Registered User Join Date: May 2011 Location: Byron Bay Posts: 1,508 My Ride: 2003 BMW 320i View My Garage	similar problem last month. Replaced plugs, coils and fuel filter. Good as new. __________________ I am never wrong. I thought I was wrong once, but I was mistaken. Three people can keep a secret...but only if two of them are dead.

11-10-2012, 09:56 AM	#3
Kstrooch Registered User Join Date: May 2012 Location: Melbourne Posts: 80 My Ride: 325ci View My Garage	Mine was doing the same thing. Ended up being the airflow sensor metre. __________________

11-10-2012, 03:18 PM	#4
Honro Registered User Join Date: May 2010 Location: Australia Posts: 165 My Ride: M3 E46 View My Garage	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 - MOD LIST - - ESS VT550 SUPERCHARGER @ 307rwkw \| KW V2 Coil Overs \| 20' Vertini Hennisy Wheels - 20x 8.5F & 20x10R - Watch My S/C Install Vid Here: http://www.youtube.com/watch?v=guCnA...ature=g-user-u

11-11-2012, 07:02 AM	#5
BrownEye Registered User Join Date: Oct 2012 Location: Australia Posts: 18 My Ride: 318i View My Garage	Mine shakes in idle due to the rear shocks being soft. Haven't got around to it yet __________________

11-11-2012, 07:45 AM	#6
Dennis323 Registered User Join Date: Aug 2012 Location: Melbourne Posts: 28 My Ride: 323ci View My Garage	i had the same issue, got my spark plugs replaced, oils and filters, runs like a dream now

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