i just replaced my air pressure regulator and ever since than the car has had a very high idle(from 1500-2000). ive got the idle adjustment screw turned down as far as it will go(no help). it does it wether its warm or cold. the high idle goes away after driving for a few minutes. any ideas on why this is.

thanks for th help.

Because that's what an air regulator does. Sort of like the equivalent of a choke on a carbureated car. 1500-2000 is too high however. It sounds like the flap is out of adjustment and opening too wide. Refer to the factory service manual.