Thanks Benzmac, I was hoping you would reply.

I immediately tried to get to the sensor, but it is not exactly easy to remove. I don't have a small enough philips head ratchet. I will take this to a mechanic I trust and have them do this.

Any ideas on why the symptoms only exhibit after the car has been turned off for 30-60 min?

Because I can hear the fuel pump when I turn the key I believe it is not the fuel pump relay giving out but what is your opinion on the fuel pump check valves?

Thanks,
Garth