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Old 11-29-2012, 08:55 AM
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Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
Quote:
Originally Posted by E34Addict View Post
However, through out the day, my idle RPM is never stable and keeps swinging between 0.6 and 1.2 approximately, and all the lights in the car goes weaker and stronger with the RPM. However, at the sea level, the idle RPM swinging is much less severe and sometimes almost not noticeable. In addition, when I am parking, I can notice a little black smoke emissions from the exhausts when I hit the gas pedal almost all the way through.
Check the air filter and MAF. Make sure it is clean and good, and throw a little carb cleaner on the MAF. If that doesnt help, then take a look at the ICV, although i'm not entirely sure how that would affect the altitude difference...
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1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

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