s300 b20b idle help

[xblaze2010x]

im at a loss the warm idle on my b20b sits between 1100 and 1275 rpm and when i blip the throttle it will rev and then drop to 700ish. after a second or 2 it will come back up to the previous high idle. if i hold the throttle open 25% for 5 seconds it will rev, drop when released and then resume idleing but now at 13-1400.


k&n short ram & filter
skunk2 alpha TB with blox tps and idle set screw adjusted 1/4 back (closed makes difference of 100 rpm or less)
skunk2 pro intake
IAC valve tested 2 no change in symptoms, throw codes when unplugged. idle changes when unplugged but not significantly.
hondata gasket
stock injectors

only 2 changes were made since tune ctr crank pulley and hondata gasket installed.

TIA

[TTR]

Pull the intake pipe off and plug the port/ports ahead of the throttle plate with your fingers. If the engine doesn't stall you have a leak somewhere. Spray the intake gasket/manifold area with brake clean to make sure the gasket isn't leaking.

[xblaze2010x]

immediately died. I guess my IAC is bad then? Ill start shopping...
thanks