Engine Suddenly Died While Driveing And Would Not Restart

hi i have a 1993 mirage cyborg-r with a 4g92 dohc mivec engine, i think i may have fault in my ignition sytem but have not been able to figure out what is wrong with the car, was working fine came home parked it up, tried to go out a hour later and it would not start, it would turn over but just woudnt fire up, i left it over night and tried it again in the morning and it started up sweet. i spent the hole day driving around in it and it seemed to have no issuses at all . eg, no lack of power, no odd noises, no misses... then on my way home the engine cut out completely all of a sudden while in gear at 50 just lost power and stoped and would not restart. got it towed home and left it till next day. next day thought id try start if before doing any work on it and it started first time so i took it for a test drive and got about 6-7km and and yet again was going mint and engine cut out and lost power completly again and would not start got it home checked few things found it didnt have spark at all but all plugs are good and leeds look like in very good condition and no visible damage to anything tryed playn around with plags and wires but still would not start and had no spark, got annoyed slamed bonnet and went to lock car but thought id try it one more time and started first time, took it for test drive got about 0.5km down the rd and engine cut out and would not start again PLEASE some one help me and tell me what the problem is and how to fix it as this is my dayly runner.