2000 civic hatch, with d16y8 obd2b, stock 2000 ex engine harness running obd1 p28. This is about to bug me to death, my temp gauge will work sometimes for a few days then it will start bouncing around then drop to cold and sometimes it wont work at all, replace all sensors/senders with new and even replaced 2 of them twice incase I got a bad new one. I unplugged the sender to gauge hand, 1 wire under the distrubtor, also unplugged it from cluster then I ran a hot wire to it under the hood then check it at the cluster plug to see if I was geeting fire all the way to it, and I was, so I then ran a new wire going from the sender straight to the back of the cluster where it plugs in at, and spliced it in, and it works correctly like this. but as soon as i put it back like stock it goes crazy again. any clue as to what the problem could be. ( sorry for the run on sentence lol )