i just got my b16a2 motor installed today. I have a 98 civic ex. When we wired the motor up we used the b16 wiring harness. Could this be the problem that my speedometer and rpm gauges dont work? Should i use my ex harness? my vtec,gas gauge, and temp. gauge works. And onother problem i ran into was the car was over heating took it out on the interstate stayed cool, so its my fan prob., havent seen it kick in. other than that the swap was alright besides the downpipe didnt line up with the exhuast. Well anyways what im asking is should i change the wiring harness to the ex motor?