Genuine 2002 Ford Explorer Sport Trac Fuel Pump

2002 Ford Explorer Sport Trac Fuel Pump Parts Questions & Experts Answers

• Q: How to check the Fuel Pump and fuel pressure on 2002 Ford Explorer Sport Trac?

  A: Starting with 1999 and later, you need fuel pressure gauges and adapters to get the reading. The pump works when the car turns or runs, as long as the control module gets a signal telling it when the engine fires; when that signal stops, the pump stops working after two or three seconds. Right after dropping fuel pressure, place a shop towel over each fuel connection to catch any remaining fuel during repair work. Hold the fuel filler cap open while someone turns the ignition key to On. Listen at the fuel filler opening for a spinning sound. First check the fuel pump fuse. If it's blown, replace it. Then see if there is any short in the fuel pump circuit. Verify the fuse is working. Pull out the fuel pump relay. Check if the connection has power with the key in OFF position, then measure voltage again with the key in ON position. The fuel pump relay sits in the power distribution box inside the engine compartment, and you should check the inertia switch when problems show up with fuel pump voltage. When you don't see voltage at the relay connector, start by looking at the fuses and wiring; if voltage is there, move on to checking the relay and fuel pump harness connector for proper battery voltage. When the fuel pump connector gets power but the pump isn't working, look for a connection to ground at the harness connector. Before checking, first drain all fuel system pressure, disconnect the car battery, and hook up a fuel gauge to test at this point. With the engine running, switch all accessories off before turning the key to ON. Watch the gauge as it reads. First check for fuel leaks, change out the filter if needed, then look at the inlet strainer. If you don't get the right fuel pressure, you'll need to change the fuel pump and fuel level sending unit module because they aren't doing their job. Turn the ignition on one notch, let the engine idle, then check the gauge reading. If low, examine fuel lines and strainer, but if high, change the module. Check both fuel pump and fuel pressure regulator for leaks after shutting down the engine, then make sure fuel pressure stays the same for five minutes. If there are leaks, look for them in the supply line, injectors, or fuel pump. Then close the supply, remove the gauge, and make sure no fuel escapes from the system when you start the engine again.