There is no "fuel sensor". The fuel system is 100% mechanical. Pump runs at 100% output when the engine is running. The vacuum referenced mechanical FPR on the fuel rail holds the pressure at a differential pressure of 39 psi across the injectors. Power to fuel pump goes thru the inertia switch. I had an inertia switch go intermittent once causing occasional no start on my 88 Tbird Turbo Coupe, and a friend had the same problem on his 86 Ranger. I diagnosed the problem by running 2 wires from the inertia switch to a small bulb I could see in the cabin. Inertia switch open = light goes on.
Try banging on the bottom of the tank with a mallet while cranking when it doesnt start. If it starts, the pump is failing.
Welcome! My 1993 was recalled because of weld spatter in the tank which leads to premature failure of the pump. I had it replace at 25k miles but the pump ran fine to 245k miles when the trans failed.
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