Figure 3-22. Fuel injector in testing and popping fixture, installation.

Figure 3-22. Fuel injector in testing and popping fixture, installation.

(c) If injector pressure drops from 450 to

(2) Injector holding pressure test.

250 psi in less than 40 seconds, check the injector

(A) Bring the pressure up, on tester, to a

as follows:

point just below the injector valve opening pressure.

1. Thoroughly dry injector with com-

(b) Close the fuel shut-off valve and note

pressed air.

pressure drop. Time for pressure drop from 450 psi

to 250 psi should not be less than 40 seconds.

3-35