im using a pw0 on my 91 hatch. the problem i had with mine was about the same as yours but all i had was an 2 injector wires crossed. another thing about the pwo on a d15b7 is it does not have a knock sensor and it is forever going to cause it to throw a check engine light and vtec wont work. i corrected that problem by chipping the ecu and removing the knock sensor and the secondary o2 sensor