How to check the fuel pump injector

Check the electrical circuit the fuel pumpand with a multimeter or tester to connect it to the terminals on the wires. If the tester has a signal wiring are OK.

Remove the protective cap fitting the fuel pumpand place a container under it, just a thin slotted screwdriver at the valve. If gasoline goes a thin stream, therefore, the system pressure is low. If the pressure of the gas well, the pressure is normal.

If possible, measure the pressure in the fuel system using the fuel pressure gauge. At home you can use for these purposes the gauge from the tire pump.

Remove the spool from the fitting of the fuel rail. Slip into the hose fitting of the gauge, tighten it with the clamp.

Turn on the ignition, but the engine does not start. The fuel pressure should rise to 2.8 to 3.2 bar and stay at that level. If it is below this figure, check the feed line. To do this, first check the filter located under the body near the fuel tank. Then pay attention to the mesh of the pump. If it is very dirty, remove the fuel pump from the tank, remove the screen and rinse it.

Check the tightness of the joining tube extending from the pump to the fuel rail. Again measure the pressure in the fuel system. If we exclude all faults, and the pressure remains low, we can conclude that the fuel pump is worn. In this case you need to replace it.

Make sure that the fuel flows to the injectors. To do this, inspect the spark plugs. If they are wet, all right. If the candle is dry, check first probe or tester, injector harness connectors. If there is no signal, therefore, it is necessary to search for malfunction in electroconducting.

If the wiring is good (on the tester, there is a signal), Unscrew the fastening of the ramp and lift it up under the intake manifold so that you can see the injectors. Turn on the ignition. If the injector nozzles are not visible trickles of gasoline, then they have failed and require replacement.