Checking injection valves (Focus Turnier 1)

You can find a faulty injection valve by simply feeling it with your hand. The valve does not vibrate when the engine is running, unlike others. But you should do this test when the engine is cold.

To check the voltage, disconnect the connector on the injection valve, connect an LED indicator to the connector (never a control lamp).

Start the engine. The indicator LEDs should blink, otherwise there is no voltage. It is also possible that the control unit is faulty. But you can only install this in a workshop.

To measure the resistance, disconnect the connector on the injection valve, connect the multimeter to both contacts of the valve. At 20°C, the resistance should be within 14.5±1 Ohm.

If the value is significantly different, replace the valve.

Remove the fuel distributor pipe with two screws (arrows) together with the injection valves.



Remove the connector from the injection valves. The fuel lines remain connected.

Turn the ignition on and off several times to activate the fuel pump and allow pressure to build up in the fuel system.

Drop test - checking each injection valve

Check each injection valve one by one: only one drop should come out of each valve - if more drips, replace the valve.



If you want to check the injection stream, you must remove the entire fuel distribution pipe. The fuel lines remain connected to all valves. Disconnect the connectors on all valves except the one being tested and place a container under it.

Turn on the ignition - the valve should inject fuel in a spherical shape.

Repeat the test for each valve.

(The original can be found on the specified resource: «www.fordbook.ru»)