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




 
			
			 
					
						 
			 obd2b tach signal wire
 obd2b tach signal wire
				 
					
					
					
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			 Originally Posted by primespark22
 Originally Posted by primespark22
					
				
 
						