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Old 01-18-2013, 01:53 PM   #2
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Join Date: Oct 2003
Location: Scenic Hudson Valley, NY
Posts: 115
My Ride: 328Ci, 328iC, X3
Originally Posted by glhx View Post
I know the SAP is not working and that the pump is bad.

Could this be why my car is running so rich? Average gas mileage is decreasing and is now down to 15mpg on the obc
The SAP would not affect fuel economy, since it only operates for the first couple of minutes after a cold start. Look elsewhere-- maybe the MAF is mis-measuring the intake air and throwing too much fuel into the cylinders?
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2000 328Ci Steptronic
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