Quote:
Originally Posted by juddholland
It's happening severely rapidly on my X3 whenever I start it and press "MAX" on the A/C. I will record this and post it for you guys to see. I'm bringing in the car again, I think. I'm at wit's end here.
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Judd,
Although it's annoying, this "idle speed hunting" seems to happen on many, if not most, X3's so seems to be part of the car's "character". It should stabilize within 20 to 30 seconds.
If yours is continuing for longer than that, you may have a problem, but if not, it seems to be pretty par for the X3 and is something the dealer probably won't be too concerned about.
It sounds like the engine idle speed regulating software is overcompensating for the alternator and A/C compressor loading at cold start-up and has some significant delay. This might be something that a factory software update might fix, but I wouldn't hold my breath waiting for BMW to get around to it.
