ok, so heres the issue.
My friends EF hatch was swapped a bit ago with an OBDO B20. Last week he converted to OBD1, but now it's all kinds of messed up. It runs fine until 3500, and then stops. We've checked everything, we went over the harness 4 times, changing things here and there, we've swapped ECUs to his brothers B20 ECU, and it still won't work. we checked everything, and i just can't figure out what's up. any help or advice would be greatly appreciated. thanks in advance