I have a 91 Integra, and my idle would surge from 1300 rpms to 2400 rpms when I was idling... up and down up and down up and... I cleaned the FITV and the IACV and screwed in the FITV all the way.... same problem... I even tried bleeding my coolant lines... same thing.... after doing all this.... I decided to just give it a shot, and adjust the idle screw in... it worked!!!! now I have a smooth 900 rpm, and runs smoother that it ever has... can barely feel the car running when sitting inside.... so, if you tried everything like I have, and got the same results... try adjusting your Idle screw in.... I mean, it does make sense, since the FITV and IACV and Idle screw do all work together..... FINALLY got that embarrassing surge to go away, and now I love my DA that much more!!! CHEERS

 

how do u do this? guidance please.. im a newbie. lol

 

on the throttle body. it is a big recessed flathead screw. i found out that my idle screw was out of whack last month. it does work