Most of the bout when the fuel pump in your van gives you discontent, it is due to low force or pump Gauze leakage seeing of worn-out components. You Testament cognizance the symptoms most when running at highway speeds--since the fuel pump Testament not be able to deliver the additional fuel--or you good Testament not be able to begin the engine due to a dead pump. On the other hand in assortment to verify that your fuel pump is elsewhere of grouping you call for to elimination the course and isolate the fuel pump. Here we Testament occupation with two of the most frequent systems--electronic fuel injection (EFI) and throttle thing injection (TBI)--going ended some easy steps to confirm that the fuel pump has reached the extremity of its advantage get-up-and-go and needs to be replaced.
Instructions
1. Place the threaded Schrader valve or blue book fuel power Harbour. Install a small jumper wire in the relay connector to activate the fuel pump and turn the ignition switch on but do not start the engine. Record the fuel pressure reading from the gauge. Turn the ignition off and reinstall the fuel pump relay.
Actuate what type of fuel string disconnect--the rubber hose to metal column connector accelerated to the fuel lambaste or TBI unit--your transaction is equipped with whether it does not corner a Schrader valve or your engine has a TBI course: spring-lock, pinch, clamps, threaded or quick-connect fitting. Fuel line connector couplings differ according to manufacturer. If necessary, consult the service manual for your particular vehicle.
3. Relieve the system fuel pressure.
4. Connect a fuel pressure gauge to the Schrader valve or fuel inlet line according to the gauge manufacturer.
5. Locate the fuel pump relay and remove it. This valve is bona fide comparable to those used on motorcar and bicycle tires. You may acquisition it on the fuel lambaste or near the fuel pressure regulator.2.
6. Start the engine and record the reading from the pressure gauge. Turn off the engine.
7. Pinch the fuel return line with a hose clamping tool or wrap the fuel line with a rag and pinch the hose with a pair of pliers to isolate the pump from the fuel system.
8. Start the engine and record the reading from the pressure gauge before the engine stalls. This reading should be almost twice as much as the one from the previous test and it will tell you if the fuel pump can deliver the correct pressure under operating conditions.
9. Compare the tests readings to the specifications given in your vehicle service manual. If any of the readings is out of specification, check that filter, hoses and lines in the fuel system are in good condition and there are no gas leaks before deciding to replace the fuel pump.
