im in the prosses of wiring my motor and im using the effin guide i found somewere and i got to the point were i swapped over the clips on the old original wirning harness so it will plug right into the obd1 distributer, i have the two extra wires that are going to be connected right to the ecu, but i also ended up with an extra black wire and i dont know what im sopposed to connect it to, i was thinking maybee its just a ground. anyone one have any ideas what this wires for?

 

do you already have a ground on your thermostat housing?

 

ya i remember bolting a ground on but now that i think about it i dont think it had as many wires as the ex harness has going to the same ground and i think i remember that there were a few tied together the o2 sensor ground and some other stuff

 

well make sure you do one thing at a time...get the mpfi swap all squared away, then attack the obd1 changeover...i tried it all at the same time, which made it very difficult to pinpoint my problems. best of luck to ya

 

since it's black i'd ground it and see what happens