I just recently put my swap into my ek and everything went smooth. When we started the car it had a idle problem which we figured was the ECU since i was using my single cam. I recently bought a obd2 p72 A04 ECU(GSR) and the motor ran more healthy but still had that reving up and down problem. we scanned it and it told us IACV which was recently replaced.. now before we replaced it the only problem I had was the Idle going up and down quickly. Once we replaced the IACV we started to hear a loud sucking air coming from inside the throttle body. the Top hole not the bottom. once i cover the hole up with my finger the car idles like a baby and runs mint. WHAT DO I DO?!!? please help

H23A blue top vtec completely stock!

NOTE :

intake mani was never touched or removed
throttle body gasket is good and we also used gasket sealant
Flushed radiator coolant and made sure no bubbles inside.
plugged up any unnecessary holes
changed MAP and TPS censor

 

i would first off use the correct ecu.. or at least one mapped for the motor.

 

i have the stock ecu for it, it turns over but i dont hear the fuel pump turning on

 

Can we get a pic of what your talking about?

 

yes give me one min. let me take some pics

 

THE TOP HOLE IS SUCKING AIR.. once i put my finger on it the idle goes good. once i put both fingers on both holes its quiet as **** and idles mint

 

THE MOTOR



THIS IS THE CENSOR I CHANGED


THE THROTTLE BODY

 

here is a video of whats going on!

http://s205.photobucket.com/albums/b...=VIDEO0015.mp4

 

I suggest going into the Prelude section, and look over the faq on surging idle.

 

IACV = Intake Air control valve. (The sensor you replaced)

P72 ecu is looking for a 2 wire IACV, You are using a 3 wire IACV because the H23A Bluetop comes with a 3 wire IACV and your engine harness must be from a 96-00 DX/CX/LX (Manual) or from an 96-00 Automatic.

You will need to do the following. Also you will need to replace your 3 wire IACV with a 2 wire IACV. I think there may be an adapter kit that allows you to do this. Give Rosko Racing a email or call.

 

^^ thank you so much, i deff will try it!


also i am using a 96-98 stock DX wire harness and where could i find that 2 wire IACV plug?

 

The plug can be found on.....

88-95 engine harness (All)
96-00 EX/HX engine harness (5-spd Manual only)
99-00 SI engine harness
90-01 Integra engine harness (All)