Rough running at low traffic speeds

H3 · 02-10-2011, 05:16 PM

My 3.0i runs great when normal driving, but the last few days if I'm in slow traffic, as in stop start, when I take my foot off the accelerator I get a knock from the engine block area and it clunks into 2nd if traffic picks up. Also it seems to misfire as I accelerate, but fine as speed picks up. It's an auto. Anyone got any experience of this before I go to the garage? I'm out of warranty. Thanks.

Bora20 · 02-11-2011, 04:34 PM

Sounds more like a transmission issue to me. Can you drive it in SD mode? That always works best for me in traffic as it holds the gears longer and makes it smoother to drive than always up-and-down shifting.

Äußerster BMW · 02-13-2011, 08:43 PM

Do you have a check engine light on? I would find an Indy shop with a GT1 and have them run a DIS test. The dealer might sting a bit.

02-10-2011, 05:16 PM	#1
H3 Registered 0 Rep 1 Posts Drives: X3 3.0i Join Date: Feb 2011 Location: Uk iTrader: (0)	Rough running at low traffic speeds My 3.0i runs great when normal driving, but the last few days if I'm in slow traffic, as in stop start, when I take my foot off the accelerator I get a knock from the engine block area and it clunks into 2nd if traffic picks up. Also it seems to misfire as I accelerate, but fine as speed picks up. It's an auto. Anyone got any experience of this before I go to the garage? I'm out of warranty. Thanks.
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02-11-2011, 04:34 PM	#2
Bora20 Lieutenant 17 Rep 464 Posts Drives: 2007 BMW X3 3.0si M-Sport Join Date: May 2006 Location: Kamloops, BC, CAD iTrader: (0)	Sounds more like a transmission issue to me. Can you drive it in SD mode? That always works best for me in traffic as it holds the gears longer and makes it smoother to drive than always up-and-down shifting. __________________ 2007 BMW X3 3.0si Titanium SilverBlack LeatherAutoPremiumM SportComfortActivityAssist & Bluetooth*
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02-13-2011, 08:43 PM	#3
Äußerster BMW Registered 0 Rep 4 Posts Drives: E46 M3, E83 X3, E32 750 Join Date: Feb 2011 Location: BC, Canada iTrader: (0)	Do you have a check engine light on? I would find an Indy shop with a GT1 and have them run a DIS test. The dealer might sting a bit.
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