WEDGE AS 5V3575 - Caterpillar

Probable Causes
Air inlet system or exhaust system
Valve lash
Hydraulic electronic unit injector
Electronic system
Engine Control Module (ECM) or personality moduleRecommended Actions
Perform the following diagnostic procedures in order:Air Inlet System or Exhaust System
Check the air inlet system for restrictions or leakage. Check the exhaust system for restrictions or leakage. Refer to Testing and Adjusting, "Air Inlet and Exhaust System - Inspect".Valve Lash
Check the valve lash. Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".Hydraulic Electronic Unit Injector
Ensure that the J300/P300 hydraulic electronic unit injector connector is fully connected and free of corrosion.
Ensure that the J2/P2 ECM connector is fully connected and free of corrosion.
Connect Caterpillar Electronic Technician (ET) to the cab data link connector. Use the cylinder cutout test. Access the cylinder cutout test by selecting the "Diagnostic Menu" and the "Diagnostics Test Menu". Run the cylinder cutout test in order to disable each cylinder. Disabling each cylinder allows the technician to isolate the misfiring cylinders. If the misfiring cylinder can be isolated to a specific cylinder, refer to Troubleshooting, "Injector Solenoid Circuit - Test".Electronic System
Connect Cat ET to the cab data link connector.
While the problem is occurring, check for diagnostic codes that are related to the boost pressure sensor and the atmospheric pressure sensor. If a diagnostic code is found, refer to Troubleshooting, "Engine Pressure Sensor Open or Short Circuit - Test".
Monitor the fuel position, the rated fuel limit and the FRC fuel limit. While the vehicle is operating under full load, the parameters should meet the following conditions:
The fuel position is equal to the rated fuel limit.
The fuel position is less than the FRC fuel limit.If the fuel position is equal to the rated fuel limit and the fuel position is less than the FRC fuel limit, the electronics are operating correctly.
If the fuel position is not equal to the rated fuel limit and/or the fuel position is not less than the FRC fuel limit, perform the following tests in order:
When the engine is off, place the keyswitch in the ON position. Check the boost pressure on the Cat ET status screen. When the engine is off, the boost pressure should be 0 kPa (0 psi).ECM or Personality Module
Check the ECM or the personality module.Refer to Troubleshooting, "ECM Memory - Test".