PUMP & MTG GP-BRAKE 2473749 - Caterpillar

Probable Causes
Programmable parameters
Diagnostic codes and event codes
Cold mode operation and cold cylinder cutout
Derate mode
Throttle signal
Electrical connectors
Injector
Fuel Ratio Control Limit (FRC)
Air inlet restriction
Exhaust restrictions
Electronic Control Module (ECM)
Fuel supply
Air shutoff valve (if applicable)Recommended Actions
Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are rated engine speed, full load and engine operating temperature. Troubleshooting the symptoms under other conditions can give misleading results.Programmable Parameters
Connect Caterpillar Electronic Technician (ET) and verify that the parameters are programmed correctly.Diagnostic Codes and Event Codes
Check for active codes and/or logged codes. Troubleshoot any codes that are present before continuing with this procedure.Cold Mode Operation and Cold Cylinder Cutout
Use the Caterpillar Electronic Technician (ET) in order to verify that the engine has exited cold mode. During cold mode, fuel injection timing is modified. When the engine is in cold mode, the cold cylinder cutout strategy may be active. The cold cylinder cutout may cause variations in vibration and available power. This is normal operation.Derate Mode
Connect Cat ET and check for logged derate events. A derate status flag will appear on Cat ET if an active engine derate is occurring. The engine speed might be limited due to one of the following possible causes: altitude, high exhaust temperatures, air filter restriction, high coolant temperature, aftercooler water temperature and crankcase pressure.Throttle Signal
Use Cat ET in order to monitor the status of the throttle. Observe the throttle position. Verify that the throttle position is smooth from low idle to high idle. The throttle position should reach 100 percent at high idle.Electrical Connector
Check for the correct installation of the ECM connector(s) J1/P1 and/or J2/P2. Check for correct installation of the applicable fuel Injector connectors. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".Injector
Use Cat ET to determine if any active diagnostic codes are present. Check that the injector trim codes have been entered. Use Cat ET to determine if any logged diagnostic codes are present. Perform the "Injector Solenoid Test". Observe that the solenoids for the injectors are being energized on Cat ET. Perform the "Cylinder Cutout Test". Locate the misfiring cylinder. Refer to the diagnostic functional test Troubleshooting, "Injector Solenoids".Fuel Ratio Control Limit (FRC)
Operate the engine under full load. Use Cat ET in order to monitor the following values: turbocharger compressor outlet pressure, fuel position, rated fuel position and Fuel Ratio Control (FRC). The fuel position should equal the rated fuel position. The FRC fuel position should be greater than the rated fuel position.If any of the above values are changing rapidly for no apparent reason, there may be an intermittent problem with the wiring. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".Air Inlet Restriction
Check for an air filter restriction indicator. Replace plugged air filters and/or clean the filters. Repair any leaks.Check the air inlet system for the following problems: restrictions, collapse, pinched