ok so after reading about cleaning the throttle body and IAC i decided to give it a wack seeing how it was never cleaned in its 12 years, after i got it cleaned and all put back i noticed that on the iniatial startup after a couple hours of sitting the RPM range drops way low almost like its gonna die at idle but this goes away after i rev it up the RPM goes back to about 750...

Could this be caused by the vacume line going into the TB because when i first took it off the vacume line didn't wanna come off and might of cracked when i pryed it off

 

Check for the leak, but it may just be some tb cleaner still in parts. Took mine a while for it to clear. Give it a while too and see.