what is this sensor on the UIM??

[richard cash]

http://i46.photobucket.com/albums/f144/mc_carthy/rx7/P2280010.jpg

what is the big black sensor at the throttle body end of the UIM as seen in the pic? come to think of it, whats the blue one too.

I had a really bad stuttering problem the other day, and the car wouldnt go more than 10feet before it would cut out. The idle was really high too. I then noticed a really loud bizzing noise from the engine bay and after disconnecting a white plug that goes into this black unit the buzzing stopped and i was able to drive the car again (limped it home as didnt want to do any damage with the sensor detatched). the revs were a little higher than normal at 1400rpm but nothing like as bad as the 2600rpm it was before i disconnected it.

Anyone have any ideas as to what it does and why it would make my car do this.

[Carl]

Black is idle speed control valve.Sometimes on Apexi\'s they prefer to run without the idle speed control valve plugged as idle won\'t drop enough.
Blue is airtemp sensor.
Regards
Carl