I dropped a B16A2 out of a VTI in my 92 integra 4dr. i have a T3T4 turbo set up. was in the process of tunning but my idle started messing up so we had to stop. The idle does not bounce when the car is driving and then stop. The idle bounces when the car sets for awhile in one place. i already checked my vaccum lines..cleaned out my IAVC...i don't think the B16a2 has a FITV so i couldn't turn that screw...i think i got all the air out of my radiator...what else could it be?

 

Most likely one of the things you already checked - just not checked good enough.

Try it with another IACV and see what happens.

 

change the iacv and also check tps and throttle cable