Another idle issue! Help! Options

[yrret7]

My idle is way to high. I've looked for a vaccum leak without success. The idle screw on the Ecu does not make any difference. The idle screw on the throttle body is turned all the way down. If i plug in the temp sensor the idle bounces and just about stalls . The aux air valve is working correctly and closes off. I'm running it now with the temp sensor in the manifold unpluged and the idle is at 2000 and won't go down. I tried pinching each vaccum hose with vise grips to find a leak. what i did find was that when I clamped the decal valve end port or side port hose the idle went down to 1000 rpm idle with no bounce. I clamped both ends of the vaccum hose from the manifold to the decal valve to make sure it as not leaking. no change. I have installed all new vaccum hoses with kit from AA.

Putting suction on the control port opens the decal valve and allows air to be blown through . So i guess that it works.

Why does closing the air flow to the decal valve by clamping the hose closed give me correct idle ???

Why does pluging in the air temp sensor cause the idle to bounce an stall if I don't feather the gas pedal?

Any thoughts??
I drove the car with the decal valve hose pinched closed and the car runs perfect!!