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Troubleshooting The Fuel Injection Nozzles On The Engine
Note: Be careful when you are handling the fuel injection nozzles in order to prevent damage to the orifices, the threads, and other surfaces. When a fuel injection nozzle is installed, make sure that all surfaces and threads are clean.Only personnel that have the proper training should disassemble the fuel injection nozzles. Only personnel that have the proper training should perform repairs to the fuel injection nozzle.Replace the fuel injection nozzle if the fuel injection nozzle cannot be adjusted in order to operate correctly.Refer to Specifications, "Fuel Injection Nozzles" for additional information. The engine is difficult to start or the engine runs rough.
Probable Cause
The fuel injection nozzle does not seal correctly in the cylinder head.Make sure that the gaskets, the insert and the mating surface of the cylinder head are clean. Make sure that the fuel injection nozzle is tightened to the correct torque.
The connections of the high pressure fuel line leak.Tighten the fittings of the high pressure fuel line.
The fuel injection nozzle does not operate correctly.Make sure that the components of the fuel injection nozzle are tightened to the correct torques. Make sure that the gaskets and the insert are positioned correctly. Test the fuel injection nozzle on a nozzle tester in order to measure the pressure setting.
The incorrect fuel injection nozzle is installed.Make sure that all fuel injection nozzles are the correct replacement parts for the engine. Refer to the Parts Manual for the correct replacement part. The engine exhaust has too much black smoke.
Probable Cause
The fuel injection nozzle does not operate correctly.Make sure that the components of the fuel injection nozzle are tightened to the correct torques. Make sure that the gaskets and the insert are positioned correctly. Test the fuel injection nozzle on a nozzle tester in order to measure the pressure setting.
The incorrect fuel injection nozzle is installed.Make sure that all fuel injection nozzles are the correct replacement parts for the engine. Refer to the Parts Manual for the correct replacement part. The engine has lost power and the engine uses too much fuel.
Probable Cause
The fuel injection nozzle does not seal in the cylinder head.Make sure that the gaskets, the insert and the mating surface of the cylinder head are clean. Make sure that the fuel injection nozzle is tightened to the correct torque.
The connections of the high pressure fuel line leak.Tighten the fittings of the high pressure fuel line.
The fuel injection nozzle does not operate correctly.Make sure that the components of the fuel injection nozzle are tightened to the correct torques. Make sure that the gaskets and the insert are positioned correctly. Test the fuel injection nozzle on a nozzle tester in order to measure the pressure setting.Test the fuel injection nozzle on a nozzle tester.
The incorrect fuel injection nozzle is installed.Make sure that all fuel injection nozzles have the correct code for the engine.
A connection of the fuel return line leaks.Inspect all connections of the low pressure fuel line for tightening to the correct torque. The engine is misfiring, running rough, or running poorly.
Probable Cause
The fuel injection nozzle does not seal in the cylinder head.Make sure that the gaskets, the insert and the mating surface of the cylinder head are clean. Make sure that the fuel injection nozzle is tightened to the correct torque.
The connections of the high pressure fuel line leak.Tighten the fittings of the high pressure fuel line.
The fuel injection nozzle does not operate correctly.Make sure that the components of the fuel injection nozzle are tightened to the correct torques. Make sure that the gaskets and the insert are positioned correctly. Test the fuel injection nozzle on a nozzle tester in order to measure the pressure setting.Test the fuel injection nozzle on a nozzle tester.
The incorrect fuel injection nozzle is installed.Make sure that all fuel injection nozzles have the correct code for the engine.
A restriction exists in the high pressure fuel line.Inspect all high pressure fuel lines for damage.Troubleshooting Fuel Injection Nozzles on a Nozzle Tester
Note: Be careful when you are handling the fuel injection nozzles in order to prevent damage to the orifices, the threads, and other surfaces. When a fuel injection nozzle is installed, make sure that all surfaces and threads are clean.Only personnel that have the proper training should disassemble the fuel injection nozzles. Only personnel that have the proper training should perform repairs to the fuel injection nozzles. Replace the fuel injection nozzle if the fuel injection nozzle cannot be adjusted in order to operate correctly.Refer to Specifications, "Fuel Injection Nozzles" for additional information.Back leakage
Fuel leaks through the threaded connection of the body and the nozzle nut.Make sure that the threads are clean. Tighten the body to the correct torque.
Debris or damage exists on the orifices.Visually inspect the components of the valve for carbon pitting, for scoring, or for other damage. Clean the surface of the orifices with solvent. Replace the fuel injection nozzles if corrosion exists. The fuel injection nozzle does not inject fuel in the correct quantity or in the correct pattern.
Probable Cause
The setting of the opening pressure is incorrect.Test the setting of the opening pressure. Adjust the setting to the correct pressure.
The fuel injection nozzle is stuck.Debris or damage exists on the fuel injection nozzle.
The orifices are blocked.Inspect the orifices for carbon buildup. The fuel injection nozzle must be cleaned or replaced.
The passage for the fuel return is obstructed.Clean the passage in order to remove any carbon buildup or other debris.Troubleshooting the Turbocharger
The engine lacks power.
Probable Cause
The air filter element is dirty.The air filter element must be cleaned or replaced.
A restriction exists in the tube between the air filter and the turbocharger.Find the restriction and repair or replace the component.
An air leak or a restriction exists in the line between the turbocharger and the inlet manifold.The component must be repaired