[toobroketoretire]

Knowns: Fuel pump and strainer 1 1/2 years old, fuel filter less than a month old, fuel pressure regulator is the 2nd one installed in the last 30 days.
With KOEO fuel pressure is 37psi (measured with two different FP gauges) and it take from 10 to 12 minutes to bleed down from 37 psi to 30psi.
Have no idea if this is within specs or not? With engine running (which is not often) fuel pressure is 37psi. Due to car dying at will, have not tried getting it out on the road. Car does not run
rough and or miss when it can be started? Sure would like to get the car up and running.. Any thoughts or suggestions..

It's very possible your fuel pump relay is failing and that's why it won't stay running. I suggest using a trickle charger to power your pump and then see if it dies. Just disconnect the wires at the fuel tank then supply power directly to the fuel pump's hot wire. If it doesn't die then you can assume the relay is failing or power to the relay is getting interrupted (the power comes from the oil pressure sender). Over time the points in the relay get a carbon buildup and they'll work until they warm up then suddenly quit. If your car has anywhere near 100,000 miles I suggest simply replacing the relay so you'll know it's good and will stay good for a long time...................

 

[toobroketoretire]

There is a fuel pump prime connector under the hood that allows you to put 12V direct from the batt to the pump bypassing the relay

That's good to know. The object of powering the fuel pump from another source is to eliminate the possibility of the relay or a bad connection at the oil pressure switch causing the engine dying. Just a part of the troubleshooting process.

The fuel pump gets it's power from the battery but it gets energized by two sources; the ECM for 2 seconds and the oil pressure switch. As long as there is at least 5 psi of oil pressure the relay should stay energized.