Why is the fuel pump not running in my Ford Focus?
Why is the fuel pump not running in my Ford Focus?
If the pump still refuses to run, there are a couple of other issues that can be present: The ignition switch power is supplied to the FPDM to power the module and splices off to power the pump itself. This needs reverified. If the Driver module has no power supplied, it will never attempt to run the pump. You need to load test the circuit.
Why is fuel pressure variable in Ford Focus?
The FPDM supplies a variable ground signal to the fuel pump in order to control the pump speed and hence the fuel pressure. (Yes the fuel pressure is variable depending engine operating conditions.)
Where is the fuel pump sensor on a Ford Focus?
The FRP sensor is on the fuel rail and can be unplugged electrically. If unplugged (FRP) the fuel pump will be commanded on at a default value, you can check to see if the pump turns on and whether the vehicle runs. If the pump runs, you have a circuit fault to the FRP or the sensor is shot.
Why is the fuel pump and relay not working?
The ignition circuit, which includes the ignition switch, controls power to many components, including the fuel pump and relay. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
If the pump still refuses to run, there are a couple of other issues that can be present: The ignition switch power is supplied to the FPDM to power the module and splices off to power the pump itself. This needs reverified. If the Driver module has no power supplied, it will never attempt to run the pump. You need to load test the circuit.
The FPDM supplies a variable ground signal to the fuel pump in order to control the pump speed and hence the fuel pressure. (Yes the fuel pressure is variable depending engine operating conditions.)
The FRP sensor is on the fuel rail and can be unplugged electrically. If unplugged (FRP) the fuel pump will be commanded on at a default value, you can check to see if the pump turns on and whether the vehicle runs. If the pump runs, you have a circuit fault to the FRP or the sensor is shot.
The ignition circuit, which includes the ignition switch, controls power to many components, including the fuel pump and relay. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
