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Old 11-13-2012, 04:16 PM   #17
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Join Date: Jul 2007
Location: Cincinnati, OH
Posts: 147
My Ride: 2002 330Ci
Originally Posted by scarede46er View Post
The high idle is caused by the Secondary Air Pump which allows the cat to heat up faster (an emission issue). European cars, imo, do not have the pump. Also, there is this thing called fast idle and slow idle. It fast idles immediately after you come to a rest. During extended stops with the engine running, it should drop to slow idle.
Fast idle, then goes to a slower idle? Are you sure that is correct? Never have heard of this or seen it on my 33oci.

Last edited by richkopena; 11-13-2012 at 04:16 PM.
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