ok i just registered to day but i have been viewing the forum for a while now anyways. i got a 97' lude with skunk throttle body and skunk manifold, the idle only surges while hot from 1000rpm to 1500rpm and is constant when its happening, sometimes it wont but when it starts theres no stopping it. and also sometimes it will idle real bad from about 1100rpm to 1300rpm very fast up and down and when you try to give it gas...nothing until you give it enough gas to where it just jumps to around 3300rpm. i have tried everthing and did everything that i have found in the related searches trust. I just put a brand new IACV, EGR is blocked, and i have no FACV due to the skunk TB.

 

go to 92lude.com and try that mod...