TheKeymaykr

Installed my H23A VTEC into my 98 Accord LX today. Used harness and PCF ecu that came with engine. Fuel pump doesn't kick on, getting no spark. Turns over when i jump the starter wire. Will not start. No fuel, no spark. Any suggestions?

TheKeymaykr

btw, Using auto trans that came with engine

holmesnmanny

You need a pinout for that ecu and compare it to your existing car/wiring harness to see if there are any pins that aren't correct.

Not sure if that ecu uses an immobilizer. If it does, you're going to need to get it worked out. Or you can get a 37820-p13-A12 which are very rare. Or you're going to need to convert to obd1.

bairdandrew77

Make sure all wires are connected properly. My fuel pump wasn't working at first after my h23a swap, i wish i remembered what the solution was! Do you have the ECU code? it should be 37820-pcf-902.

Shouldn't the 5th gen auto prelude ecu work just as well? or does that have something making it not compatible?

TheKeymaykr

It is indeed a pcf....Yes i certainly do need the pinout....pcf has no immobilizer. I feel it's either a difference in the A plug or the plugs at the underhood fusebox. Without the pinout I'm pissing in the wind.

TheKeymaykr

But thanks for the input guys

nus_dogg

Don't use the H23 harness, re-use your stock F22 if you haven't.

TheKeymaykr

Well I've already used the H23 harness. I don't think my F23 harness would be compatible with the pcf ecu. I don't think I have the option of using an obd1 computer since it's automatic. And my PAA for the F23 certainly wouldn't run the H23. I just need that pinout for the 98 jdm accord SiR wagon.

holmesnmanny

5th gen has the immobilizer that's why i said he'd have to figure out...someone could use it then take their car down to honda and have them program the immobilizer to the ecu...there's more details but that's the gist

since his pcf is immobilizer free he just needs to figure out what pins are different, if any

it's always best when doing these swaps to do them with a manual engine...if he tried using the p13 a12 ecu with that auto car im not sure how it would work since the A12 doesn't have auto capabilities...im always interested in how this would work but haven't seen anyone do it yet

SpokaneSpeed

You haven't over-looked anything obvious, right?? Like missing the ECU ground @ thermostat housing... ;-) its a common one. Have you tried plugging your old ECU back in to see if you can get the fuel pump to prime?

TheKeymaykr

Yea I checked all the grounds including the one at the thermostat housing. I got some different color wires at the two plugs under the fuse box underhood. I have the pigtail of the A plug from the CH9 Accord and there are different colors and locations from mine. So I'm still seeking pinouts and schematics from the CH9. Got the schematics for the CG6 from a friend off AllData. Either way, the car is 90 miles away at my brothers house. So I'll figure it out this weekend hopefully. Maybe somebody will locate some CH9 schematics for me. Thanks fellaz

TheKeymaykr

oh and yes I tried the old ecu....same thing except the SRS light comes on upon ignition on....neither one gives CEL when u turn the ignition on at all

TheKeymaykr

Looks like I'm defeated...guess I'm going back in with the F23...this really blows

GhostAccord

Do you have power and ground @ the ECU?

Check pins A11 & A24, With the ignition in the II position should see battery voltage. With the ignition off there should be 0v.

Check continuity for the ECU grounds @ Pins A9, A10, A22 & A23.

TheKeymaykr

Well the A plug is different for the pcf than the paa....I'm pulling the motor now to put the F23 back in. Not happy. At this point it just has to run.

GhostAccord

So the H23A VTEC is OBD2A or B?

Should only be a couple pins that you would have to swap vs swapping an engine. But if manhandling an engine vs troubleshooting electrical is your bag. I can't knock it. i know a lot of people who hate electrical issues.

Did you check power to and from the main relay? You mentioned that the fuel pump doesn't prime... That is a main relay/ignition issue.

TheKeymaykr

Yea Well I'm an ambulance electrician....and a damn good one....but this ain't no ambulance. I was getting power to the main relay but nothing out....I'm sure the relay is fine, it's been running the car....without the pcf pinout & schematics that nobody has i just have no way to know what goes where. The whole reason I did this was cuz the trans was shady...I should've just changed it out and been happy...without something else to drive i just don't have time to troubleshoot electrical any more than I've already tried...so I got the trans off the H23 bout to bolt it to the F23 and change out the speed sensor and put it back in the car and hope for the best....thanks

TheKeymaykr

Oh and it's obd2a

TheKeymaykr

There are definitely differences in the ignition circuit and i believe that's where the problem lies. Too bad, I've just ran out of time. Can't go another week without my car lolol

GhostAccord

That was going to be my next question.... Is this something you need to daily drive. That makes a big difference in the amount of trouble shooting you can do.

I was always under the assumption that the OBD2A JDM is the same as the USDM OBD2A. That's where I got those pins from, an OBD2A ECU.

So are you using an OBD2A engine harness, OBD2B firewall-ECU harness and an OBD2A ECU? Or a complete OBD2A wire harness?

If you are using an OBD2B harness in the middle maybe this will help the next time you go to throw this engine in;
http://www.hondacivicforum.com/forum...rmation-73241/

Swap the OBD2B wires over to the OBD2B pins.

TheKeymaykr

Na it's all obd2a. I assumed they were the same between US and jdm, but i was so wrong! Maybe I'll buy a little civic later and throw the H23 in it. That way i can go the 5spd and chipped ecu route and not have to worry about it cuz as you know there is all kinds of useful info on that. At any rate I got the old motor and jdm trans back in, almost got everything hooked up and the sky fell on us! Lol! So I'll finish it up in the morning. And if it doesn't start then I'll have a 98 Accord for sale! Lmao!

TheKeymaykr

And Ghost....you had the manhandling part right! I'm freakin tired! Again thanks for your suggestions and everything...