How to Test Fuel Injector of a Diesel Engine
Testing of fuel injector is carried out as follows. Mount the fuel injector in its test rig and connect up the oil supply. Under no circumstances should hands be placed under the injector spray. The high velocity oil jet can penetrate the skin and cause blood poisoning. With the injector priming valve open, operate the hand pump to prime the injector. Once the fuel flows from the priming valve it can be closed.
Oil Container
Pressure Gauge
Shut off valve
Pump lever
Test pump
Injector
High Pressure fuel pump
Operate the pump rapidly for several strokes. The injector should open with a high pitched chatter and fuel should be emitted in a fine cloud. After the injector opens, check to make sure the pressure does not fall off too quickly.
To test for the tightn...