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There isn't a sensor on these. There is a regulator, if that what your looking for? it is inside the plenum attached to the injector control. Under the big plug near the rear of the engine.
Try replacing the fuel filter first, but it sounds like your loosing your fuel pressure prim when the fuel pump is not working. The fuel pressure should be 62-65 PSI with the engine not running the the ignition key turned on and should drop about 5 psi when the engine is running. If you turn the engine off and check the fuel pressure, it stat steady for morn then 15min. If it drops fast, then you have a leak at your fuel pressure regulator (common) or your return fuel check valve which is located at your fuel sending unit.
Start with the simple and replace the fuel filter, it could just be to dirty to pressurize the fuel system fast enough giving you the hard start.
Thank you for using Fixya and good luck
You'll need to see if your fuel pump is providing fuel pressure. First test would be to take off fuel cap, listen through filler tube as someone turns ignition on for a few seconds, then off for a few seconds. Repeat a few times you should hear the fuel pump start then stop as it builds pressure.
No noise, then test voltage coming to pump if yes, 12 volts, replace fuel pump. Test ground also before replacing pump.
I would expect it to be this as the computer wouldn't allow the vehicle to run with fuel being poured into the engine otherwise.
If it's pumping, you will need to do pressure testing to determine if it pumps enough, or just replace it as either just the pump, or the complete pump assembly that drops into the tank rather easily.
Pumps are available at dealers OEM, discount auto parts stores, and I've had good luck with pumps that I've bought on eBay.
I just went through a major costing repair. My fuel pump blew and we discovered the pressure test # are wrong. Mine, like yours was showing it in the range but it in fact wasn't. Also the sending unit is on recall.
Before spending several hundres on a fuel pump, I recommend doing a fuel pressure test. You can get a test gauge pretty cheap at a parts store. If the pump is junk, you raise the truck, lower the fuel tank, unplug the electronics from the pump at the top of the tank, then with a hammer and flat head scrwedrive, gently tap the lock ring in a counter clockwise direction until it pops off. Pull the pump assembly out and install the new one. Reverse directions to install.
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