I just had a B18C1 put in my '93 Integra with a '95 GSR throttle body & Skunk2 manifold and there was no spot for the FITV so it was left out. But when I start the car the idle jumps to 2500 and will slowly go down to 2000 and then surge back up and it'll do this for about 5 minutes until it settles at 1500. When driving if I let off the gas the idle goes down to about 1000 and then jumps up to 2000 and will settle at 1500. IAC is connected, The idle screw is turned all the way in, PCV connected, bled the coolant several times and all vacuum lines are free and connected correctly. What's left??

 

turn the idle screw out about 1 turn and try that . if that doesnt help start looking for a vacuum leak.

 

tps sensor or idle adjustment screw

 

what's an fitv? adjust your idle screw after you disconnect your iacv sensor so the idle can be lowered. i would think, new IM or TB gasket, vacuum leak somewhere, or your iacv is reading wrong. check ecu codes??