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Old 06-22-2002, 08:54 AM   #4
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Join Date: Jan 1970
Location: Alexandria, VA
Posts: 3,083
My Ride: 2001 325ci

Remember that the ECIS doesn't rely alone on the intake grill. It also is getting a fair amount of air from the front headlight below the bumper. If a great enough vaccum is created those little flaps will open but are negligable with the ECIS since it's getting more air from other areas.

Originally posted by Jspeed
I think I know what you're talking about. Those flaps open up when the throttle opens beyond a certain point. When you video taped the ECIS, was the hood open? If so, the heat-shielded area would not be enclosed and the vacuum wouldn't be great enough to open up any of those flaps.
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