The OBDII system can be unsettled when doing that. The O2 sensor detects gasses which are not allowed, and would give the DME the order to work on emergency course. This can result in a higher mileage and a stick engine.
Repair the air pump or buy a new one.
BMW '96 M3 (SOLD) June 2005 Car Of The Month!
Originally Posted by Torque
I was just dropped off here by aliens one day. They got bored with me.