My Laguna 1995 1.8 8 valve wont start. help please?

Ok I was driving and the engine just stalled, It started and ran ok for about 5 minutes, then the engine started to miss fire and loose power. eventually it sounded like it was running on one cylinder, till it stalled completely, It has not started since.
I have checked there is a spark from the coil, but I had no spark from the plug leads??? So i bought a new dist cap and rotor arm. still not starting, there is fuel coming into the single injector and a spark at the coil lead. Could the problem be with the TDC sensor?