I have a 1991 Honda Accord DX with 160K miles. When the car is hot, the car intermittantly starts, it will turn and shut right off. If you let it sit for about 5 minutes, it will start. It sounds like it's getting some fuel, because it starts and shuts right off. Fuel injection is good, had that cleaned out already, distributer cap was changed already, on a scheduled tunup. Has anyone have this problem before? Could it be the injector relay? Any input will be greatly appreciated.

Thank you in advance!