when doing mpfi swap how exactly do you pin the wires into the ecu? do you soder them in of is there special way to put them in?

 

http://www.fourthgenhatch.net/depin.html

 

well, if you want to do it cleanly, you can push the pins out the back of the obd0 plug with the wires still attached, and then depin a obd1 harness plug and insert the pins into the corresponding location on the new harness. major PITA if you ask me, when you can just buy a conversion harness or send it out to be converted by someone who knows what they are doing. But if you've got a lot of free time and not a lot of money, it may be the way to go..