Hey , i have a 1994 geo prism 109000miles . It will run fine for anywhere from 5-40 min then quit with no warning. even at 70 mph. then will not start until engine cools down a little 10-20 min. replaced cap,rotor ,plugs,wires,coil,module and distributor. also tried new ecm. code 12 keeps coming up, dist,ecm or camshaft sensor(no sensor listed for this car). any ideas? when car dies no spark. thanks