Seriously weird iacv problem on the ka24e

[skatermatt180]

On my 90 240sx Im having an issue with the iacv. I got the engine running good after a rebuild, but noticed a buzzing noise in the dash and the e-brake light was stuck on. I researched it here at nico and it was a fuse for eng cont. I replaced it and BAM idle is at about 1700 cold and warm. I disconnected the iacv and the idle went back down to its normal self. I reconnected it and I heard this click and WWOOSSH and the idle was back up. Obviously its kicking on when it doesnt need to. I think its iacv, the valve at the back of the intake plenum on the ka24e next to the idle air controller for the a/c, could be the aac, but you get the point if you have ever worked on or seen a ka24e.

What could it be? I adjust tps in spec too, and air bypass screw is all the way in. One thing Im thinking is could it be that I dont have a idle adjustment screw on my throttle body (lost it)? Would the computer detect that and try to compensate? But even with it disconnected it runs fine...so why the compensation?

I dont know Im stumped, somebody with input would be greatly appreciated!!