whould it be better to swap from dpfi to mpfi or swap another d series in my 4 door 91 civic what would be the best d series to get

 

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when doing the mpfi swap if i just swap the all the motor wiring i dont have to splice the ecu do i

 

you can't just swap to a mpfi engine harness unless you also switch out the cabin harness. much easier just to add the few wires you need and run them into the car. you can even use an old connector if you like to run the wires through so that if you ever need to disconnect the harness completely from the car you won't need to pull those wires back out of the cabin.

 

read this over and see how easy mpfi is...