F22B1 swap, VTEC not working - Honda Prelude Forum

94ludeSaud · 08-13-2011, 11:13 AM

so i just swapped out my blown F22A1 for a F22B1, my question is what do i have to do in order to get my vtec working? i know im gonna need the wires but is the P12 ECU that comes with the A1 vtec compatible? and if not what would be the preferred ecu for my swap

S-LudeDan · 08-13-2011, 11:27 AM

here are the numbers:

37820-P0A-A51 - if you have auto

37820-P0A-A01 - if you have manual

P0A = OBD1 (94-95 F22B1)
substitute with P0H = OBD2 (96-97 F22B1)

What is the number on your P12? also stay away from using P13 on your motor.

For Vtec all you have to do is run wires.

94ludeSaud · 08-13-2011, 11:38 AM

my bad, i should of mentioned idk too much about the ecu's. this is the first time i do something like this. where can i check those numbers? the motors a manual 96 B1

S-LudeDan · 08-13-2011, 07:04 PM

Looks like you have OB2 motor. If your ECU says 37820-P0H-A01 then you are in the clear. I don't know if P12 says that number. Check what it says on your ECU, it should have the sticker on it.

Keep in mind, there are people that can tune your ECU to make it work for you. I just wouldn't know anything about that. I hope someone here chimes in and helps you out.

94ludeSaud · 08-18-2011, 11:45 AM

the number is 3780-p12-a50. this mean im SOL?

S-LudeDan · 08-18-2011, 12:58 PM

SOL?

all I know that the ECU you have was not originally compatible with your motor. I'm sure you can tune it to work for you, just that I don;t know anything about that.

94ludeSaud · 08-19-2011, 09:10 AM

S**t Outta Luck lol i think im gonna just run the wires for vtec and see how that works out before i keep looking into ecus

94ludeSaud · 08-22-2011, 07:24 AM

so my next issue,where to find vtec wires. i been real busy lately and havnt really been able to look too hard but i havnt found anything on ebay or anything like that. you guys kno anywhere to find a good vtec wire?

WhitenBlack94 · 09-06-2011, 11:44 PM

just use regular copper wire coted of course. the vtec wire i believe is blue than you have a black ground and a green wire that goes into the green connector right below the vtec selenoid. correct me if im wrong. And you will just need to find a wiring diagram to show you where they plug into your ecu. if i get some free time ill take my ecu out and show you where my wires are ran for my h23vtec

94ludeSaud · 09-07-2011, 06:58 AM

thanks whiten, but i dont just need the pins i need the whole subharness. i found this website that sells themrywire.com but they dont have an option for f series motors so idk which other one would work

94ludeSaud · 09-13-2011, 08:07 PM

bump

94ludeSaud · 09-25-2011, 10:00 PM

so i installed a P0A A01 and the motor seems to just not agree with it. the engine backfires nonstop and stalls after accelerating. i tried running the car with a friends P28 and the car ran fine. ive done my homework and the 95 accord vtec ecu is a P0A so im completely lost to what the problem is.

btw ive tried two different P0As so i kno its not just a bad ecu