idle prioblem HELP

[GSXdsm97]

OK well first let me start by saying i have posted this problem before but now it is worse. I dont have my lap top becasue it got sent to service so i cant get any logs up. here is my problem,

my car will idle rought at 1500 go up to 2000 than drop to 1500 than go back to 2k.. it does this all the time. than if I am lucky it will idle right at 700. or it will go the down to like 200 and than stahl out.. I dont know what to check. I replaced my O2 so that is brand new I just put it in today any help would be great thanks
ps what should my AFP be set at

 

[Jeff99GS]

The BISS is the small philips head screw on the throttle body...it adjusts the amount of air flowing into the Idle speed control valve. If you turn it Clockwise the idle will drop....if you turn it counter clockwise the idle will Raise. there is a small O-ring on that BISS screw that sometimes leaks.

The TPS is the throttle Position Sensor It is also Located on the throttle body. Its Job is to tell the ECU (computer) what Position the throttle plate is in. The TPS can also leak

So are you saying the shop did a boost leak test? what did they presure test?

 

[GSXdsm97]

they did a pressure test your rirght. i have to do a boost leak test. i am going to go change the BISS