High Idle Been there done that....

[bmwguy325is]

OK so I have a 300K 325is. It has a miller MAF kit and headers. I double checked the values for idle in the ECU and they are correct.
I have replaced the intake boot, ICV, resealed all of the various pipes around the throttle body, changed all the hoses on the intake the fuel pressure line too. I did a smoke check and smoke came form the tube of death/bitch tube.
SO today I replaced the orings on the tub o Death and still have a high idle.
Car idles at 12 pretty steady.
Any suggestions on where to go from here..............

[jlevie]

Check the TPS for operation of the idle switch with a meter or test light. The idle switch should close when the throttle arm is 0.030-0.060" off the idle stop screw. Also clean the ICV with carb cleaner until the vane moves freely. A good ICV should vibrate when the ignition is on if the idle switch in the TPS is good.

[Ninz30]

Ill leave this here. I think its something to try and isn't very difficult.

http://pelicanparts.com/bmw/techarticles/JF-Tech/BMW_E30_3_Series_Idle_speed_troubleshooting.htm

[bmwguy325is]

Check the TPS for operation of the idle switch with a meter or test light. The idle switch should close when the throttle arm is 0.030-0.060" off the idle stop screw. Also clean the ICV with carb cleaner until the vane moves freely. A good ICV should vibrate when the ignition is on if the idle switch in the TPS is good.

The ICV is brand spanking new so I hope it need no cleaning.
I will try the messurments on the tps. The guy who did the work simply unplugged it and the idle ran high.