ADAPTER-CENTER 3886377 - Caterpillar

Probable Causes
Cold mode
Engine derate or active codes
Programmable parameters
Throttle position signal
Fuel supply
Air inlet and exhaust system
Inlet manifold pressure
Rack controls
Electrical connectorsRecommended Actions
Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are high engine speed, full load, and engine operating temperature. Troubleshooting the symptoms under other conditions can give misleading results.Cold Mode
The Electronic Control Module (ECM) limits engine power during cold mode operation. The ECM may cut out certain engine cylinders. This will increase startability, and this will reduce warm-up time. Cold mode is activated whenever the engine coolant temperature falls below a predetermined value. Cold mode remains active until the engine has warmed, or a time limit is exceeded.Engine Derate or Active Codes
Some engine monitoring parameters that are capable of triggering an engine derate do not produce an event code. Connect Caterpillar Electronic Technician (ET) in order to check for a derate of the engine.Certain diagnostic codes may cause poor performance. Use Cat ET to check for active codes and for logged codes. Troubleshoot any codes that are present before you continue with this procedure.Note: Although a sensor's signal may be in the operational range of the sensor, the signal may not represent the actual reading. Use Cat ET to check that the pressures and the temperatures are fluctuating. Also, check that the values are reasonable for the conditions that are present.Programmable Parameters
Record the full load settings and the full torque settings. The settings should be programmed to the values on the engine information plate. Refer to Troubleshooting, "Programmable Parameters" for more information.Throttle Position Signal
Monitor the status for "Throttle Position" on Cat ET. Verify that the status for "Throttle Position" is stable and that the engine is able to reach high idle speed. If a problem is suspected with the throttle, refer to the appropriate troubleshooting procedure for troubleshooting the throttle signal.Fuel Supply
Visually check the fuel level in the fuel tank. Do not rely on the fuel gauge only. If necessary, add fuel to the fuel tank. If the engine has been run out of fuel, it will be necessary to purge the air from the fuel system. Refer to Operation and Maintenance Manual for the correct procedure.
Check the fuel lines for the following problems: restrictions, collapsed lines and pinched lines. If problems are found with the fuel lines, repair the lines and/or replace the lines.
Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.
Check the fuel tank for debris or foreign objects which may block the fuel supply.
Prime the fuel system if any of the following procedures have been performed:
Replacement of the fuel filters
Service on the low pressure fuel supply circuitNote: Check the fuel system for air. Refer to Systems Operation/Testing and Adjusting for information that is related to checking the fuel system for air.
Check fuel quality. Cold weather adversely affects the characteristics of the fuel. Refer to the engine's Operation and Maintenance Manual