long story short, i bought a ek civic with a d15b7 in it ( non v-tec ). She had some codes on her on course. im at the last engine code and it's iacv. cold start up it will rev up to 2200 rpms, warmed up it will rev up at like 1600 rpms. the wiring is the issue im 99% sure. the iacv is wired for 2 wires. i know the p2e ecu want's 3 wires. but i can't find anything on a obd1 engine non v with this issue. can i use a y8 throttle body even though it's non vtec ? emissions wants no engine light on and it has to be obd2. any help would be great

 

3 wire iacv throttlebody.

 

so just the throttle body I can use . I'm confused now, this harness was changed for a 2 wire . I can't find any information on the 3 wire. a14 and a13 at the ecu for power and ground. since I don't have vtec a12 wouldn't have a wire in it correct ? .. so where would I wire the 3rd (I'm guessing yellow/black ) wire ?

 

What type was the car originally? The OBD2 manual EX was wired for 2 wire IACV. There are no non-VTEC OBD2 ECU's that use a 2 wire IACV though.

 

it had to be have been a cx it . i just bought it. im guessing it had a vtec swap in it because i pulled that wire out, a12 had the positive wire of the iacv. .. it's chopped city .. i put back a14 and a13, but idk where the 3rd wire would be or what color (there is a cut black wire around the back of manifold) in the hatch i found 5 new iacv's so i knew it would be a can of worms ..i just can't find this 3rd wire i have black/blue and orange... im currently looking for a d16y7? throttle body at the moment..hopefully should have one by tonight.

 

from what i see it was converted to a 2 wire iacv, theres a knock sensor connected into the ecu,and vtec was added.i guess the last owner took out the good stuff, and tossed in a obd1 motor, originally the car was a automatic but it's been converted to manual. i got all the codes off but this iacv.

 

::bUmP:: and if i do change the throttle body won'tthe tps have 2 wires instead of 3? it's a bit confusing for me, im guessing i have a y6 thorttlebody already on the car but it's an automatic one...

 

Again, the only OBDII ECU that can run a 2-wire IACV is the one for the manual EX. But that one also expects a VTEC engine it will throw codes if no VTEC solenoid is present.

All TPS are 3 wires. The EX-type intake has horizontal air flow through the throttle body (the air pipe faces to the side) the DX one is vertical the air pipe faces up. I think the automatic EX had horizontal flow and 3 wire IACV.

 

^^^ correct, get a 96-00 EX or HX auto throttle body

 

i got the throttle body .swapped out the spring and bracket. Figured out the coolant lines.. cleared my code .. now the check engine light is off . But i now have a jumping idle after the 1st 30 seconds of a cold start... i have what looks like to be a z6 intake manifold. should i get a t.b. gasket for a y7 (automatic) or z6 ? that idle is driving me up a wall

 

wow this D-series shat is confusing, so i got a y7 t.b gasket for an automatic, took off the old gasket had 2 side holes, so that was wrong.
i jumped the gun thought i had a leak in my throttle body, so i permatexed the **** out of it. still jumping idle, so i took the filter off the intake pipe, placed my hand to cover the intake hole and she idled perfectly. took off the pipe did the same on the t.b. and it shut off (i found that being strange because i know for a fact that pipe wasn't leaking.
noticed the port on the intake maniold (z6) had a hose on it going to the pcv valve .. took that **** off plugged the port on the manifold idle is good (little high but that is ok for now ) anyway this issue is fixed

 

Something is hooked up wrong. The PCV valve should be connected to the manifold after the throttle body, and go down between the runners of the manifold to the tin box on the back of the engine. This pulls a controlled amount of air and vapors out of the engine. The small pipe from the side of the big air pipe should be a direct path (no PCV valve) to the valve cover to let replacement air into the crankcase.