can anyone help me before i lose my mind..!! ive recently had the cam belt snap on my M reg tipo. so after trying to just put a new belt on, (fingers crossed) to no avail, i pull the head off to find the valves have slapped on top of the pistons bending a couple.. so ive sourced a replacement engine and dropped that in. now ive got a wiring issue. my original engine had a sensor on the bottom pulley with three wires going to it. the engine ive fitted has a sensor on the flywheel (other end) with only two wires going to it. ive tried joining and bridging wires together but car still wont start... please can someone help me get another dead fiat back up and running before i get seduced by the dark side...!!!!!: