Ok I'm stumped. Spark; yes. Gas; yes. Starts every time I don't need to go anywhere. When I need to go somewhere it wont. Seems to be more prevalent during hot weather. Eliminated vapor lock possibility by installing a check valve between filter and engine near pump. Checks when hot and pressure is definitely good. Checked wiring to all ECU sensors and looks good. Got it running and disconnected sensors one at a time and each one caused a change in running. I haven't done reference/speed sensor yet. Anyone know a way to test them? My family believes that it just wants to mess with my mind. I am tending to think that also. Electrical manual being delivered on Monday. Any suggestions would be appreciated.