ive got a 98 civic ex i bought a motor that was supposed to be done its a b20b4 block with a 99-00 civic si head i need to figure out if i can use my old ex wiring harness i need one with a crank angle sensor because i have a b20 crank angle sensor on the block. do the crank angle sensors off the ex harnees the same plug as a b18 b16 b20? or are d series different is anyhting else different or do i just need to get s 99-00 si engine harness?

 

no, use your EX harness. you dont need the crank sensor

 

Dont you need that CKF sensor for the obd2 ecu?