All the Info on Accord Swaps that I find seem to be OBD1 '94-'95 Accords with OBD1 H22A's. The only things I see for the OBD2A Accord to OBD1 H22A swap is a little blurb about relocation of the crank angle sensor; which I understand. So I've been doing my own research from looking at OBD1 Accord pinouts, OBD2A Accord pinouts, OBD1 H22A pinouts, OBD2A H22A4 pinouts, and comparing all of that to what I already know about the OBD1 car to OBD1 engine swap. Basically I'd like to share what I've found and would appreciate some confirmation or any extra info that I've missed.

-Here's a general link of informations that I pretty much find with every search: http://www.hondasociety.com/bo...61998

-I'm not worried about the OBD1 ECU & pins , I'm just worrying about the correct OBD2A pins for the ECU. When I have it all wired properly, I will cross reference the wires of the OBD2A to OBD1 conversion harness, to make sure it is wired properly. I'm doing it this way in case the owner decides to some day use a USDM '96 OBD2A P13 ECU (because of emissions testing), he can just unplug the conversion harness and plug in the ECU.

-I need to add wires for the IAB (secondary "butterfly") and the knock sensor. VTEC is already wired up because it's an EX.

-From that link (as well as many many others), it says I need to swap pins for the O2 sensor heater and the EGR solenoid. From the pinouts I have been looking at, this appears only to be true for the '94-'95 (OBD1) Accords. My pinouts show that the OBD2A Accord doesn't have the EGR solenoid (as stated above), and the O2 sensor heater is in the same place for both OBD2A vehicles (pin A6). So from what I've seen, I don't have to swap ANY pins at the ECU, just add a few. (NEED CONFIRMATION)

-As stated before, I understand the crank angle sensor wiring. I also understand the internal and external coil issues for the distributor.

-I also understand that I will likely need to lengthen some wires; IAT, MAP (firewall vs throttle body), IAC valve, O2 Sensor wires, ECT, and the alternator power wire.

This is what I've been able to come up with for this swap. I just really want to make sure I have all the info correct instead of wasting time searching for an answer if I'm wrong or missing something. If anyone can help me confirm that I'm headed in the right direction, or has any more info to share, I'd truly appreciate it. Thank you.

 

^bump^ for a last ditch effort to get a response.

 

just buy a boomslang harness. direct plug in. i believe. not 100% sure though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jayjaythejet &raquo;</TD></TR><TR><TD CLASS="quote">just buy a boomslang harness. direct plug in. i believe. not 100% sure though</TD></TR></TABLE>
Nope. That's the OBD2A to OBD1 conversion harness that I already mentioned, it's already taken care of. I'm talking about the sensors that are required by the ECU & any wiring differences that aren't already built into the stock Accord engine harness.

 

Other than adding the knock and IAB? I really don't think we did anything else differently.

 

Cool, that's what I was hoping to hear. Thanks for the help.

 

Yep!

I just added those and did the OBDII to OBDI wiring harness for the ECU. The MAP i didn't even have to extend - just get a vacuum line and you're good.

 

good info you should write up about how you didd the wireing for the coild and the pins and have it stickyed you seem like you know what your doing. anyway good job.

 

i think that you can get a harness converted by hasport.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jayjaythejet &raquo;</TD></TR><TR><TD CLASS="quote">i think that you can get a harness converted by hasport.</TD></TR></TABLE>
Very true, but that's not always the best way of doing things, IMO. When my friend did his H22A Civic swap 6 years ago, he sent out his harness to HCP to get the wiring right. If we knew what we know now about the wiring, he could have saved himself $200+ and a lot of time by doing it himself. And this isn't my car, it's someone else's. Other than having me do it, sending out the harnesses was the other option.

 

i did this swap myself and i couldn't get it to work with the conversion harness and the p13, it also asked for the vtec pressure switch. I'll look to see what pin, but i dont' think the 96,97 had the pressure switch so it has to be added so that the ecu know when to throw solenoid. I ended up buying a p28 and having it chipped with a h22a basemap. It runs without any codes. It did throw vtec pressure but after i added that it was cool. The iab seems to come open at hight throttle due to vaccum even if it doesn't get the signal, i'm guessing the signal is for trouble codes. I don't get to use the knock sensor right now but i'm not worried about it. Anyway good luck.
later
gibby