Rough cold start ups (in summer)
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Joined: Jun 2007
Posts: 1,845
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From: Atlanta, GA
My Ride: 2008 535i:
(8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans
Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps
Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
I checked the service report and it didn't say. Basically during a cold start, the car's idle would be rough while the rpm dropped from cold to warm idle and always ran fine after that. Never got a check engine light. The SA said there weren't any codes when they ran the diagnostic, but I made them keep the car overnight and they witnessed the rough idle the next morning. They wound up keeping the car for almost a week and its been running fine since.
EDIT: I re-read your OP and my symptoms were pretty much identical to yours.
EDIT: I re-read your OP and my symptoms were pretty much identical to yours.
Contributors
Joined: Aug 2008
Posts: 9,986
Likes: 1
From: Zoo York
My Ride: Alpine White 2006 530Xi (SLD)
Buy some MAF sensor cleaner and clean it. If rough idle goes away after cleaning, you have your culprit. Usually, it goes back to running rough after a day or two, so you'll probably need a new MAF sensor anyway. Hope this helps.
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