do you mean the obd1-obd2 dizzy plug? if i have that and i just dont need to plug the crank sensor in at all? i was told i have to wire a few wires together.
by useing the jumper harness it bypasses the pin for the crank fluctuation sensor you can wire it up without the jumper but it will take some patience and homework on the web id just get the jumper and call it a day