Fuel Injector Faults and Solutions
by Starlight Generator dieselgeneratortechA little or no fuel injected.
Causes:
(1) There is air in the fuel supply system.
(2) Seizure of the fuel injector nozzle.
(3) Abnormal fuel supply from the fuel injection
pump.
(4) Oil leak at high-pressure fuel pipes.
(5) Wear of fuel injector nozzles.
Correction
Prime the fuel system.
Let a professional serviceman
check and replace the nozzle assembly.
Refer to fuel injection pump
fault for troubleshooting.
Tighten the pipe locknut and
replace the pipes with crack, make replacement if required.
Let a professional serviceman
replace the nozzle assembly.
Too low fuel injection pressure.
Causes:
(1) Lose pressure regulating screw.
(2) Deformation or break of the pressure regulating
spring.
(3) Seizure of needle valves.
Correction:
Let a professional serviceman
readjust the screw to the defined pressure and tighten the locknut.
Let a professional serviceman
replace the injector spring.
Let a professional serviceman
replace the nozzle assembly.
Too high fuel injection pressure.
Causes:
(1) Pressure regulating spring force too high.
(2) Seizure of needle valves.
(3) Block of the injection holes.
Correction:
Let a professional serviceman
readjust the spring force.
Let a professional serviceman
replace the nozzle assembly.
Let a professional serviceman
check and clean the injection holes. Replace the injector if necessary.
Fuel leak at fuel injector.
Causes:
(1) Break of pressure regulating springs.
(2) Damage of needle valve
facing.
(3) Seizure of needle valves.
(4) Deformation of tightening cap.
(5) Poor contact between nozzle and injector body.
Correction:
Let a professional serviceman
replace springs.
Let a professional serviceman
replace the nozzle assembly.
Let a professional serviceman
replace the nozzle assembly.
Let a professional serviceman
replace the caps.
Let a professional serviceman
repair or replace the nozzle assembly. Replace the injector if required.
Poor fuel atomization
Causes:
(1) decay of pressure regulating
spring force or break of springs.
(2) Wear of fuel injector nozzle seat surface.
(3) There is impurity on the fitting plane of fuel
injector nozzle assembly.
(4) Deformation or wear of nozzle assembly.
(5) Seizure of needle valve.
Correction:
Let a professional serviceman
replace the springs.
Let a professional serviceman
repair or replace the nozzle assembly.
Let a professional serviceman
clean the nozzles.
Let a professional serviceman
replace the nozzle assembly.
Let a professional serviceman
replace the nozzle assembly.
Fuel spray in kine or fuel dripping.
Causes:
(1) carbon deposit at nozzle holes and block of
injection holes.
(2) Wear of needle valve seat surface.
(3) Seizure of needle valve.
Correction:
Let a professional serviceman
clean the injection holes. Replace the nozzle assembly if necessary.
Let a professional serviceman
replace the nozzle assembly.
Let a professional serviceman
replace the nozzle assembly.
The surface of needle valve is burn or in blue-black.
Causes:
The engine is overheating
Hope it is useful to you
Correction:
Check the cooling system and do not over-load the engine for a long time. Let a professional serviceman check the nozzle assembly and make replacement if necessary.
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Created on Nov 20th 2019 00:05. Viewed 296 times.