We may earn a small commission from affiliate links and paid advertisements. Terms
H23 ECU will not work with an H22 because it is not designed for a VTEC engine. If you have an H22 in your auto Accord I'm pretty sure you will need the JDM auto ECU and TCM to make it work right.
ok I did the same thing you have done here with my car (aside from yours being jdm, but that doesn't matter) So to pass emissions you will need to use a 97 accord ecu. The car will run on it, just limp it around of course. Drive it for at least 24 hours (a complete cold start is required to run all the checks) then when you have no check engine lights take it to emmissions. Now once your done with emissions change to obd1 get it chipped and tuned. I would go with a p13 or p72 when you convert to obd1( and you must get it tuned). The p72 will allow the for a special control that lengthens the intake runners and give you more low end horsepower. I'm running a p72 tuned off of crome. Hope this helps, I log on very rarely now so if your confused let me know and I'll try to get back to you soon.
P72 will work if you chip it for the h22a, and so will the p28 is its chipped also....the p13 is the stock ECU for the h22a and i have only used JDM ecu's n products, so couldn't tell you about the USDM.
the p72 will cost about $100 maybe less maybe more to chip n basemap it for the h22a, so p13 would be you easiest bet unless you got future plans for the motor than use the p72 or p28 and find a tuner who will chip it and program it....