my car idles bad, up and down, wants to die out when it goes down. does it mainly when car is warm up and been driving for about 5-10 min. and on. ive tried seafoam, tried changing timing, adjust the air ratio on th throttle body, change my fuel filter, change spark plugs and wires, ran compression test 180-180-175-180. i herd that it could be my idle control valve, can someone tell me where its located at in the engine bay?? and how much would it cost to buy a new one. i have a stock 94 hatch cx with 187k miles. i'm planning to swap so i dont wnat to spend money on this motor. i was wondering if i had to change the idle control valve can i use it on a d16z6/a later on??? and what is a IAC. any help would be great. thanks.

 

I would recheck the gap

mine was wrong and my idle was like yours

 

I would first check for vacuum leaks.
If that comes out ok
then swap a good know IAC (Idle air Control valve)

 

the gap for the valve you mean? and how do i check for vacuum leaks

 

I had the same problem, you can only buy the iacv from honda and its like a 300$ part. Look on finding a used manifold with one already on there. good luck.

 

take the idle air control valve off and spray some throttle body/carb cleaner in it, worked for me

 

oh wow 300 from honda. i found one at a local honda store that sales honda oem parts for cheap. i check and its around 100. thought that was expensive, now i know how much it really cost. haha thanks.

 

try cleaning it it with carb cleaner

 

check for vaccum leaks!

 

how do i check for vacuum leaks??

 

Pull off a vacuum hose and see if theres any change. If there is theres a leak. But if its a bad leak then you wont see a change and need a gauge or a good ear and listen for it.

IAC, take off the 2 12mm bolts from the back and spray down the screen with carb cleaner. shake it off and put it back on.

FITV is another thing that might cause it. 3 10mm bolts under the throttle body drops the FITV. 2 screws on the side, take them off and screw the white piece down.

All free to do.

 

Checked for coolant leaks? Refill coolant/bleed the coolant system. (??????????)

 

i clean the IAC, i spay the heck outta it, the screen is clean as new. but it made my problem wrost. now i have to turn up my idle max just to keep from dying out. was i not suppose to spray it in both holes?? and just only the screen hole? i'll give the FITV a shot. and where can i find the right vacuum hose(s) to test. and can someone show me how to bleed my coolant for a 94 hatch cx stock motor. thanks.