BRACKET 4T0732 - Caterpillar

Probable Causes
Unit injectors
Fuel supply
Air supply
Accessory equipmentRecommended Actions
Unit Injectors
Check for correct installation of the J1/P1 and J2/P2 connectors for the Electronic Control Module (ECM). Check for correct installation of the valve cover connectors that are for the unit injector solenoids. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Perform the "Injector Solenoid Test" with Caterpillar Electronic Technician (ET) in order to determine if all of the injector solenoids are being energized by the ECM.
Perform the "Cylinder Cutout Test" with Cat ET in order to identify any injectors that might be misfiring. Refer to Troubleshooting, "Injector Solenoid - Test". Fuel Supply
Check the fuel pressure. Refer to Systems Operation/Testing and Adjusting.
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.
Check the fuel tank for foreign objects which may block the fuel supply.
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.
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 circuit
Replacement of unit injectorsNote: A sight glass in the low pressure supply line is helpful in diagnosing air in the fuel. Refer to Systems Operation/Testing and Adjusting.
Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual.
Check the fuel pressure after the fuel filter while the engine is being cranked. For the correct pressure values, refer to the Systems Operation/Testing and Adjusting manual. If the fuel pressure is low, replace the fuel filters. If the fuel pressure is still low, check the following items: fuel transfer pump and fuel pressure regulating valve. Air Supply
Check for restrictions in the air inlet system. Refer to Systems Operation/Testing and Adjusting.Accessory Equipment
Check all accessory equipment for problems that may create excessive load on the engine. Repair any damaged components or replace any damaged components.