ITR intake manifold swap????

[SixtySecondAssassin]

i just bolted up an usdm itr manifold to my obd1 b16a. when i was swapping all the parts over to the new manifold, i noticed the valve on the back of the manifold didnt line up properly. luckily my brother had an obd2 ls manifold with this valve on it, so i just swapped it over. now when the car is running, the idle bounces from 1500-2000rpm and the car is overheating. when i unplug the valve on the back on the manifold, the idle drops to normal. any ideas?

 

[D See 2]

the iacv?

 

[SixtySecondAssassin]

if thats the valve on the back of the manifold then yes.