Fuel System Air Leak Testing: Notes
NOTE:
Before starting this test procedure, verify that the fuel tank(s) contain at least a half tank of fuel. The fuel level compensates for the range of vehicle attitudes that may uncover the fuel sender pick-up hose or sender by-pass in the fuel tank when the fuel level is low. Visually inspect fuel system for obvious problems such as kinked hoses, damaged lines or damaged push-connect fittings. Make necessary repairs before continuing.
CAUTION:
Use care when removing or installing hose to the plastic fitting at the fuel injection nozzle return lines. Lubricate hose with diesel fuel to ease installation.