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      03-21-2013, 08:33 AM   #21
OrangeInOhio
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Drives: 2008 328i
Join Date: Jun 2012
Location: Dayton, OH

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Quote:
Originally Posted by mxa121 View Post
+1

I'm getting irritated. On cold starts it stumbles badly. Once warm it is less noticeable.
New plugs and it runs worse
I replaced my air filter back in December and I get the same thing. I have a 328i and it stumbles for the first 10 seconds or so when starting up then runs smooth. On warm days I haven't noticed it. My gas mileage has been shot to hell too. I was averaging 26-27 MPG before that and not I'm getting anywhere from 21-23. I've had it less than a year though, so I guess it could just be the cold weather... I'm going to look into it more when it gets warmer if it doesn't get better.
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2008 328i | BMW PE | 3 Stage Intake IM | OFT Stage 1 Tune | K&N Drop-in