Low fuel rail pressure, warning light on dash on! (so i have been told!) any ideas what could be wrong and where to find the fuel rail?

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SEE ENGINE CHAPTER ,REMOVE.

no year car told or country told.
when it BEEPs use a scan tool to see why with DTC errors
i might be low fuel warning but is just a wild guess.
if one gauge reads wrong I may beep
not MPH
but RPM. , fuel , engine temps too high, or Odometer data is wrong, or corrupted
a door ajar

**DON'T OPEN THE FUEL RAIL!!** The injectors run at a VERY high pressure! If you need the fuel pressure checked, get a good mechanic to do it.
Assuming that...
the vehicle was a runner before the winter.
there is fuel in the tank.
there are no warning lights showing on the dash.
Try cranking the engine over in short bursts. This should pull the fuel through and the engine should start.

Running out of gas is a real pain,but your pump would not fail because of this only. If you often run the tank low on fuel it will cause premature pump failure because the fuel cools the fuel pump! I suggest you check to see if you have fuel pressure at the fuel rail. If you have fuel pressure(20 to 40 psi) then check fuel volume,(about 1 pint in 30 seconds) If you have pressure but no volume your filter is most likely resricted. One easy way to check the pump is to have someone turn the ingition switch from off to run, with the fuel door open put your ear to the filler inlet and listen for the pump to run. it should run for about 3 seconds If you dont hear the pump running check the fuse and relay for the pump.If it is running replace your fuel filter(much cheaper than a pump and wont hurt to replace anyway). Hope this helps Bill

P0193 FORD - Fuel Rail Pressure Sensor Circuit High Input
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start Possible causes - Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel Pump

There is not a cut and dry one answer fixes it for this code, it has to do withthe fuel supply manifold pressure sensor not reading correctly. Here is the diagnostic info.
P0190 FORD - Fuel Rail Pressure Sensor A Circuit out of range
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start Possible causes - High fuel pressure
- Low fuel pressure
- Damaged FRP sensor (most common)
- Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Vacuum leaks
- Fuel leaking causing loss of pressure

sounds like the fuel pump in the tank is playing up and not delivering the right pressure

if you still have low pressure, try a new fuel pressure regulator, but a miss is usually ignition related, plugs, wires, etc.

P0193 - Fuel Rail Pressure Sensor Circuit High Input
The Fuel Rail Pressure (FRP) sensor is a diaphragm strain gauge device in which resistance changes with pressure. The electrical resistance of a strain gauge increases as pressure increases, and the resistance decreases as the pressure decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signal to the Powertrain Control Module (PCM) corresponding to pressure.

Strain gauge type sensors are consider passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow.

Voltage that is dropped across a fixed resistor in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.

The FRP sensor measures the pressure of the fuel near the fuel injectors. This signal is used by the PCM to adjust the fuel injector pulse width and meter fuel to each combustion cylinder.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start

Possible causes
- Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel Pump


Hope this helps (remember to rate this answer).

Check fuel pressure at injector rail. It should be at least 45psi.
If it is low replace fuel filter. If pressure is still low you will need a new fuel pump.
Dirt from the bottom of the fuel tank may have burned the pump or blocked filter.