[shorod]

If the pump is running some times, the problem won't be a tripped inertia cutoff switch. That isn't to say that it couldn't be a faulty switch electrically. What you might want to try is checking for fuel pump relay voltage to and from the fuel pump relay portion of the Constant Control Relay Module (CCRM). If the relay is attempting to energize the fuel pump but the pump is not running or not getting power, that narrows your search considerably.

I'm not a professional technican or even in the car industry, so I can't say that it's uncommon for fuel pressure regulators to fail. However, from your description I agree that the regulator is not likely your proplem.

As for relying on a dash light if the inertia switch is tripped, that's not a real common indication. There are not many cars that have this feature, and I'm pretty sure your '95 Taurus does not. Since the inertia switch kills the power to an electric fuel pump, I doubt they've used them since the Pinto, but I'm sure the Pinto was in the engineer's mind when he/she decided such an inertia cutoff was a good idea.

-Rod