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WARNING WARNING: HIGH–PRESSURE FUEL LINES DELIVER FUEL LEAKS. INSPECT FOR HIGH–PRESSURE FUEL LEAKS WITH A SHEET OF (Fig. 1). HIGH FUEL INJECTION PRESSURE CAN CAUSE PERSONAL INJURY IF DIAGNOSIS AND TESTING - FUEL LINES LOW–PRESSURE LINES Restricted or Plugged supply lines or fuel filter can cause a timing fault that will cause the ECM to oper- DELIVERY - STANDARD PROCE- DURE). HIGH–PRESSURE LINES Restricted (kinked or bent) high–pressure lines can cause starting problems, poor engine performance Examine all high–pressure lines for any damage. Each radius on each high–pressure line must be Replace damaged, restricted or leaking high–pres- sure fuel lines with the correct replacement line. CAUTION: The high–pressure fuel lines must be STANDARD PROCEDURE - AIR BLEED AIR BLEEDING AT FUEL FILTER A certain amount of air may become trapped in the fuel system when fuel system components are ser- WARNING: DO NOT BLEED AIR FROM THE FUEL Some air enters the fuel system when the fuel fil- ter or injection pump supply line is changed. This It may be necessary to manually bleed the system if: • The bowl of the fuel filter/water separator is not partially filled before installation of a new filter • The injection pump is replaced • High–pressure fuel line connections are loosened or lines replaced • Initial engine start–up or start–up after an extended period of no engine operation • Running fuel tank empty FUEL INJECTION PUMP BLEEDING (1) If the fuel injection pump has been replaced, air should be bled at the overflow valve before (a) Loosen the overflow valve (Fig. 2) at the rear of the injection pump. Fig. 1 Typical Fuel Pressure Test at Injection Pump 1 - FITTING 14a - 2 FUEL DELIVERY R1 FUEL DELIVERY (Continued) |