i have a 99 em1, stock harness but its hacked to **** from the previous owner. i have a jdm b18c in it now, im pulling the motor and i plan on putting a new harness it. whats the difference between obd2a and obd2b? which one would be the best choicee? also if some plugs are left unused what is the correct way to get them out of the way? plan on doing a little tuck over the winter since i need to put a new harness in anyways, thanks for the help in advanced

 

That wat i have on my 00 em1... I use si harness wire.. U can use which ever it doesnt matter.. I can tell u more about it.. U can text me at 3365122498.. I can give u alot of details and i rather want u to do it rite cuz im having hard time passing inspection here at NC... Remember jdm motor will not b able to pass easily bcuz it doesnt have certain sensor like the usdm.. And our car is an OBD2 so u will have check engine light.. Or u can PM me