do u need an aftermarket ecu to remove the airpump and keep a stedy idle?
i take it you are removing your cat before you remove the airpump?
:wave
If you are removing the airpump you need to decat and if you do this i would suggest and apexi pfc. Even when all this is done you probably wont get a steady idle as the pfc is constantly learning and everytime you stop at the traffic lights it can be slightly different...