Lucas Service Training Centre
14. BENCH TESTING INJECTORS
To check injector opening pressure a test rig will be necessary on which the line pressure can be varied from 0100 lbf/in2 (0689.50 kN/m2).
Fawley White Spirit 100 plus 50 parts per million
Santolene C or Shell Calibrating Fluid C.
The procedure is as follows:
(i) The injector should first be flow tested (flow rate 5060 g.p.h.) at 100 lbf/in2 (689.50 kN/m2). During this test the needle must vibrate freely off its seat, and the injector must produce an evenly distributed cone of fuel at an angle between 55 and 65 degrees
(ii) Flow injector with applied pressure of 100 lbf/in2 (689.50 kN/m2), and gradually reduce to zero. Use air blast to remove fuel from nozzle tip. Increase applied pressure to 40 lbf/in2 (275.80 kN/m2), and check time taken for a droplet to appear at injector tip. This should not be less than 60 seconds.
(iii) Flow injector with applied pressure 100 lbf/in2 (689.50 kN/m2), and gradually reduce pressure to zero. Use air blast to remove fuel from nozzle tip. Increase applied pressure and note pressure at which injector sprays, this should be between 45 and 55 lbf/in2 (310.26379.21 kN/m2).
15. HOW TO INHIBIT A CAR FITTED WITH LUCAS P1 EQUIPMENT
16. QUICK CHECK OF FUEL FLOW RATE