Toyota Repair: I RUN A REPAIR GARAGE. I AM..., ecu ground, spark plug wire

Question
I RUN A REPAIR GARAGE. I AM WORKING ON A 1994 TOYOTA CAMARY 4 CYL. AFTER CAR IS WARM AND DRIVING FOR A ABOUT AN HOUR CAR WILL NOT RESTART INTERMITTANT. I HAVE REPLACED THE IAC VALVE WITH A DEALER ONE. REPLACED THE DIST ASSY TWICE. REPLACED THE IGNITER. NEW EGR VALVE. NO CODES IN COMPUTER. WHEN CAR IS HOT IT HAS GOOD POWER AND RUNS WELL JUST STARTS HARD.  GOOD FUEL PRESSURE WHEN WONT START. CAR HAS SPARK WHEN NOT STARTING. IF YOU DISCONNECT ONE SPARK PLUG WIRE CAR STARTS WHAT DO YOU THINK.

Answer
I would suspect the ECU itself or possibly a bad ECU ground connection, it sounds like that for some reason the fuel injectors are cut off, the fact that it runs when one spark plug wire is removed makes no sense to me,make sure the fuel injectors are getting an on-off signal from the computer, check it with a test(noid) light.
Check the computer connectors for any corrosion or loose pin connectors.