silversilver

Alright this is my last question pertaining to the (very shitty)f swapped car i bought

Re wired the whole swap,adjusted the monting spots,got the vtec working, installed an o2 sensor(the ****** was running this **** without an o2 sensor for months, who knows how burned the pistions are) got a chiped p28 tuned for an h22.i wanted one tuned for my engine, but i was running on a stock p28 and i know its dangerous because of the fuel mapping a stock p28 for a dual cam. got the chipped one for cheap as a solution with cel shift light and 2step

The car runs great now after all the work i've put into it, when launching i spin tires all the way till the middle of 3rd gear, the only problem is my high 3k idle. This is because of the prev owner not swapping out the 3 wire iac to a 2 wire. I already wired everything up and when connected to a 2 wire iac i have i get no check engine lights(amazes me that my problems might finally be solved) so i know all i have to do is mount the damn thing. I know its not a vaccum leak since if i put my fingers over the two little holes inside the throttle body the car dies or idles fine if i cover it just enough to let a small amount of air pass.

I just want to know how to mount this 2 wire iac, i've been searching google for a good few days now and nobody gives a clear answer. What i've read was: get an adapter plate or get an h22 top plenum from a 93-95 prelude and slap that on.

Does anybody know of a place that actually makes the adapter? How hard is it to remove the top plenum from an f20b and install the one from the h22? I really want this car running right and im sure the high idle is hurting something so im trying to get this fixed asap. thank you for the help

silversilver

Its so hard to find a soultion for this ****, nobody ever finishes a thread with the same problem as me.....

silversilver

This is a f20b intake



this is an euro r intake



This is the adapter from rosko



and here it is installed



The adapter would be backwards if i tried to install it on an f20b style, right? I really don't wnt to swap out the intake for an h22 since i've been reading it will be a pain with the studs being a different size.

The adapters ARE out there but i just dont know what the hell to buy, anybody?

silversilver

and here's the other side.....totally can't run it backwards



Can anybody please post some wisedom before i go insane

f20b_h2b`

I just had the same issue as u I posted a thread recently to help sorry im late to seeing this.

https://honda-tech.com/hybrid-engine...v-fix-3262799/

Do you happen to have a copy of your tune. I would love to see the timing its running. Im in the middle of tuning mine.

Also the tops are the same so you can interchange them no problem.

asinclado

has anyone taken apart the iac valves and switch the motors? is that a posibility? I will be going through all this soon when I start doing my swap. right now I have a obd1 prelude IM, but who knows how it'll go once I start putting everything together.

f20b_h2b`

I highly doubt the IACV's are interchangeable they are completely different shapes and sizes. If you already have a Prelude you can just use the IM manifold and not have to mess with it. The F20B IM IACV and injectors are a pain in the ***. No one knows the real size or volts so trying to tune it right suxs. I found someone that says they had them flow checked at 310 cc so i just kinda guessed the voltage between the s2000 and 97-01 injectors. I have no clue which version f20b he had either.