I'm redoing my dpfi to mpfi in my 90 CRX DX because it wasnt running right. I'm at the point where you wire up the injector 2 and 4 to the ecu pinouts. And I was wondering, when I do that can I just cut the 2 wires that are in there now and solder these on to those or do I have to tap into those wires and let them be as they are?

 

As long as your cutting and SODERING onto the right pins there shouldn't
be a problem.

Posting this in the EF forum would probally get you better responses.