p13 ecu question

hey guys how u all doing? i got a question i buy a jdm p13 ecu and i put it on my 90 accord with a h22 engine swap. when i put the computer in the car the engine skips alot and when i put the stock factory computer that came with the accord the car idel perfect. u guys think that the ecu is something wrong with it ? or is it because is jdm ? please help. when the car is idel is skiping but when i get on it the car do perfect it will go i mean is fast when the car is already going but the problem is when is idel's when i put the p13 ecu the car burs alot of gas is like i sending too much gas to the engine but i'm having all this problems whit the p13 but not with the pt3 that came with the accord
any help would be apreciated
thxs

Did you do any wiring for the OBD1 engine and ECU into your OBD0 car?

Did you do any wiring for the OBD1 engine and ECU into your OBD0 car?
my car is not obd0 is obd1 it's got 3 plugs like any obd1 out there
well for what i know alot of pleople told me it is obd1 3 plugs btw my ecu os jdm p13 4w. do u guys think that the 4w plug is making the car do that ? cause my accord dont have the 4th plug some told me that the 4th plug is for the rear wheel drive steering . u think it may be some damage in my ecu ?
i wire the vtec selenoid, vtec pressure swich, knock sensor, abI sensor
thxs