Check the pressure of a vehicle's fuel pump by hooking a pressure gauge to the fitting of the fuel pump, having an assistant rev the engine and checking whether the pressure matches the vehicle's specifications. Eliminat... More »

To check the fuel pump, you need a multimeter to check the voltage that your pump needs and to test the positive and negative leads. Determining the wires for the fuel pump and for the fuel gauge is the most challenging ... More »

Troubleshoot a malfunctioning fuel pump by listening for telltale sounds and testing the fuel pressure. The most obvious sign of a failing fuel pump is the vehicle's failure to start. When all of the elements necessary f... More » Vehicles Car Parts & Maintenance

To test a vehicle's fuel pressure regulators, connect the fuel pressure gauge to the fuel rail and start the engine with the vacuum line detached, and then attach the vacuum line and observe the drop in pressure on the g... More »

Signs that a fuel pump is failing include a sudden sharp decrease in overall gas mileage, high car temperature and frequent related engine stalls, slower acceleration or frequent drops in speed when accelerating or going... More »

To install a fuel pressure regulator, disconnect the fuel line to the old regulator, install the gauge, and then reconnect the fuel pump to the fuse. Disconnect the battery, and install the new regulator. Before starting... More »

To check electric fuel pump pressure in a Ford F150 pickup, test the engine with starter fluid, connect a fuel pressure gauge to the Schrader valve, have a helper crank the engine, and look at the reading on the gauge. T... More »