Quote Originally Posted by primespark22
ok so ima install a new wiring harness on the car and ima use a 2000 gsr harness on my ej1 with b18c swap.the harness is plug and play even tho they are different obd's.the problem is since the harness is obd2b i have to manually add the tach signal wire,anybody know how to do this or a write up of this

http://www.b20vtec.com/forums/b-seri...-do-i-use.html

9th post down.
"you will have to run a wire for you tach guage to work, from the blue wire on the dizzy, to the blue wire on your driver side body harness clips..."