OK so I'm doing mpfi swap 91 sedan I have 0bd1 injectors. ...I've read that you're supposed to pin the wires that would go to the resistor to a15. .cut solder To wire but what about the wire you cut does it need to be taped off or solder them together

 

all of the yellow with black (or black... whichever wires are the same color between the four injector leads) are the 12v supply and should be joined together in some fashion. solder, junction connector...

the multicolor wires (different color for each injector, normally blue, red brown and yellow) go the the "A" connector on the ECU pins 1, 3, 4, 5... IIRC. The ECU grounds these sequentially to operated the injectors.

 

Hey man thanks a lot one more question running 0bd0 can I use a 0bd1 iacv .will the plugs be the same

 

Sorry I'm a newb

 

The iacv needs to match the manifold. If your manifold is obd1 then it will fit.