alright i swapped a zc in a 91 civic si, and i'm not getting fuel to the # 1 cylinder, but all others are firing I wondered do injector resisitor boxes go bad alot, and if it's possible for only one injector not to get a signal?? are the injectors the same as the d16a6??? I tried already different dizzy, pm6 and pm7, fuel pressure regulator, and put an injector from the d16 in the place of the one on the dohc zc. any other ideas???