i'm pretty sure you guys on here have answered this question before.I tryed doing the search but i didnt find anything on this ,so anyways here it goes i just got 1998 usdm prelude donor car with motor and tranny everything to do the swap into my 92 vx hatch. I was told that the factory engine harness from the h22a4 could plug into my vx car harness w/out doing to much wiring conversion, and the only thing i need to do is find a obd1 p13 or p72 ecu. i want check you guys on here to see whether this is true or not

and also i checked honda oem catalog part # for the engine harness
1998 honda prelude 32110-p5m-a00
1992 honda civic vx 32110-p07-a00

from what i see the middle numbers are for the ecu cars run,
so in theory i could use the engine harness, but i would need an obd 1 p13 ecu
please corrcet me if i'm wrong


Modified by hondahatch1204 at 12:06 PM 2/2/2007


Modified by hondahatch1204 at 12:09 PM 2/2/2007

 

You can find all the info you will need here!!! https://honda-tech.com/zerosearch click the link...

 

i believe they have to be same obd to plug in... usually you use your stock harness and modify to fit your engine.. for example shorten or lenghten the wires, add plugs... and use ecu same year as the engine. but you will have to get a obd1 to obd2 jumper.. use a obd2 p72 ecu...

 

https://honda-tech.com/zerothread?id=650329

https://honda-tech.com/zerothread?id=1754671


and dont use that p72 bad idea. lean=boom

 

you can use a p72 ecu, but you have to do it right. but use the one off teh prelude with the same year if you aren't familiar with any of this

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akandok &raquo;</TD></TR><TR><TD CLASS="quote">you can use a p72 ecu, but you have to do it right. but use the one off teh prelude with the same year if you aren't familiar with any of this</TD></TR></TABLE>

you could get it chipped with h22 maps. thats about the only way you can use a p72 ecu on a h22. the maps are way different, it would be ok to stay under 3.5k rpm. but in high cam, starving the engine is noo good

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by THC07 &raquo;</TD></TR><TR><TD CLASS="quote">starving the engine is noo good</TD></TR></TABLE>
i am aware... give the guy some more info if you have it then

 

why do a lotta h22 guys run the p72 then?

 

because they have IABs on them, and because there fukin idiots.

if you chip your p72 w/ h22 maps then your best off, w/ your iabs working, but you can also add IABs to you p28.

 

https://honda-tech.com/zerothread?id=1873544


https://honda-tech.com/zerothread?id=1867436


https://honda-tech.com/zerothread?id=591213

There are obviously mixed feelings about whether or not to run a p72 ecu on this swap. those threads have different opinions. I guess you just have to try them yourself

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akandok &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1873544


https://honda-tech.com/zerothread?id=1867436


https://honda-tech.com/zerothread?id=591213

There are obviously mixed feelings about whether or not to run a p72 ecu on this swap. those threads have different opinions. I guess you just have to try them yourself</TD></TR></TABLE>

It's not a matter of opinion. Running a P72 that hasn't been programmed with maps tuned for an h22 is not good for the engine. Inappropriate fuel and timing maps will limit power and hurt longevity.

Just because someone is arguing for a position doesn't mean it has any merit.

 

see personally i wouldnt know because i have never tried it myself. yes it seems obvious enough that a p72 ecu should be chipped if running an h22, but some people are using a stock p72 and have no problems doing so. i do not want to argue, just stating some things that i have read. if i was in this position i would chip my p28 ecu and go off of that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akandok &raquo;</TD></TR><TR><TD CLASS="quote">see personally i wouldnt know because i have never tried it myself. yes it seems obvious enough that a p72 ecu should be chipped if running an h22, but some people are using a stock p72 and have no problems doing so. i do not want to argue, just stating some things that i have read. if i was in this position i would chip my p28 ecu and go off of that</TD></TR></TABLE>

some ppl just dont know any better, the only reason that i can think of that makes p72 so common with h22s, is the IABs.

I have used a p72 to test IABs and i tell ya what, it idled good but absolutly no power, the ppl that use p72 and think there ***** fast have no idea what there missing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by akandok &raquo;</TD></TR><TR><TD CLASS="quote">see personally i wouldnt know because i have never tried it myself. yes it seems obvious enough that a p72 ecu should be chipped if running an h22, but some people are using a stock p72 and have no problems doing so. i do not want to argue, just stating some things that i have read. if i was in this position i would chip my p28 ecu and go off of that</TD></TR></TABLE>

Maybe no short-term problems...

 

i guess, they will find out sooner or later