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 »

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 »

Fuel leaking from near the tailpipe and black smoke coming from the vehicle's exhaust system are both common symptoms of a bad fuel pressure regulator. A worn out or faulty regulator may also cause the check engine light... 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 »

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 find the location of the fuel pressure regulator, follow the fuel rail in the engine. The fuel rail usually leads to the fuel pump regulator. Fuel pump regulators are also commonly attached to the firewall of the car. More »