[hatzie]

Originally Posted by rpmerf

When it is going bad, it can randomly stop and start working. A wire will break and if they are touching, it works, if not, it doesn't. It can stall out, let it sit for a couple minutes, try it a couple times, and it works. Sometimes hitting the tank with a hammer can help jostle it enough it get it running again.

If you can hear it come on when you turn the key, then I believe it should be fine. Just be sure to listen so you know if it came on when it doesn't start.

Electric fuel pumps internals can wear out so that they loose the ability to build full specified pressure.
When the pump output pressure drops to the ragged bottom edge of the system pressure needed you get driveability and startup issues.

It'll show the same symptoms as a failing fuel pressure regulator. At 200,000 + miles it would not be shocking for the fuel pump to be worn out. Fuel pressure regulator the same way.

I've pulled the upper intake on a couple rigs and found the lower intake washed clean by leaking fuel from the SCPI injector lines or the fuel pressure regulator.
It it hasn't been done yet upgrading the old SCPI spider to the MPFI spider is a fairly large improvement. It's not inexpensive so you want to be sure the injector spider is the issue. Delphi is OEM GM but you really pay for it. AC Delco is not as expensive.