SEAL 1782437 - Caterpillar

Probable Causes
Unit injectors
Fuel 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 J300/P300 connectors for the unit injectors. 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 Circuit - Test" for the proper procedure.Fuel Supply
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.
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.
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.
Purge air from the low pressure fuel supply circuit.
Cold weather adversely affects the characteristics of the fuel.
Check the fuel pressure after the fuel filter while the engine is being cranked. If the fuel pressure is low, replace the fuel filters. If the fuel pressure is still low, check the following items: fuel transfer pump, fuel transfer pump coupling and fuel pressure regulating valve.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.