F23A1 IACV on Euro R intake manifold

[Bense]

Will a 3-wire IACV from a F23 bolt up to this weird european type R intake manifold?

[GhostAccord]

Yes they will bolt up. However, if you don't have an OBD2 ECU to run the 3 wire IAC, it's not worth it. You would be better off buying/making a 3 wire to 2 wire IAC adapter plate.

There easy enough to make, even easier to buy I guess. Blacktrax 3 wire IAC Adapter

[Bense]

Yes they will bolt up. However, if you don't have an OBD2 ECU to run the 3 wire IAC, it's not worth it. You would be better off buying/making a 3 wire to 2 wire IAC adapter plate.

There easy enough to make, even easier to buy I guess. Blacktrax 3 wire IAC Adapter

I have a 3-wire PWM controlled IACV that Joseph Davis suggested I ghetto rig so that it can run off of the map that David sent me to burn on this chip. It runs on 2-wire OBD1 signaling.

[GhostAccord]

OK. as long as you have an aftermarket PWM controller for the 3 wire IAC. I have yet to see anyone go through the steps off adding PWM control for an IAC.

Make sure to post up the gear that you are using. I would be interested in how this is done. I always just opt for converting to a 2 wire IAC when running a 2 wire OBD1-2 ECU's. It's easy enough to add the wires if you do a complete OBD2 F23 engine and ECU upgrade.

[Jarrett]

To your observation, Ghost-and I know you're aware of this-the reason you never see it is because converting to a 2-wire is simply the cost of an IACV and adapter plate away.

There is seemingly no advantage to using the 3-wire, so it's just not needed.

[Bense]

To your observation, Ghost-and I know you're aware of this-the reason you never see it is because converting to a 2-wire is simply the cost of an IACV and adapter plate away.

There is seemingly no advantage to using the 3-wire, so it's just not needed.

There's no feasible way to hand make an adapter plate for the h23a VTEC manifold. It would have to be a counter-sunk socket cap screw that sits flush on the plate so that the obd1 2-wire iacv will bolt up to it. Which, can be done but I didn't have the fancy drill bit that will cut without a taper.

Additionally, the common Euro R IACV adapter plate is reversed from the h23. It won't work.

Furthermore, all of that is unnecessary. Just repin it.
https://youtu.be/KLCs_PJdvGs

[GhostAccord]

Your idle RPM seems a bit low for an engine running with an active IAC valve. What did you have your idle set for in the ROM/Tune, is it 500-650 idle?

What happens to your idle if you were to unplug the IAC while it is running?