GASKET 9H6454 - Caterpillar

Probable Causes
Diagnostic codes and event codes
Air inlet or exhaust system
"Fuel Position" and/or "FRC Fuel Limit"
Fuel quality
Valve adjustment
Flash fileRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Determine if the diagnostic trouble code that directed to this procedure is present.
D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure.
Codes
Result: An associated code is present.
Troubleshoot any associated codes before continuing with this test.
Result: A code is present for an exhaust port temperature.
Proceed to Test Step 2.
2. Check the Air Inlet or Exhaust System
A. Check the air inlet system for restrictions and/or for leaks.
1. Check for an air filter restriction.
2. Perform a visual inspection of the system for damage or restrictions. Also, inspect the air inlet system for air leaks in the piping.
B. Ensure that the turbochargers are in good repair.
C. Check the exhaust system for restrictions.
Leaks, Restrictions, or Damage
Result: The air inlet and exhaust system is OK.
Proceed to Test Step 3.
Result: The air inlet and/or exhaust system is NOT OK.
Remove any restrictions that were found. Replace any damaged components that were found.
3. Monitor the Intake Manifold Pressure Sensor, "Fuel Position", and/or "FRC Fuel Limit"
1. Monitor the status of "Fuel Position" and "Rated Fuel Limit" while the engine is operating under full load.
2. Verify that there are no active diagnostic codes for the intake manifold pressure sensor.
3. Monitor the status of "Intake Manifold Pressure" and "Intake Manifold #2 Pressure" on Cat ET without engine running.
A problem with the "FRC Fuel Limit" will only cause black smoke during acceleration. A problem with the "FRC Fuel Limit" will not cause black smoke during steady state operation.
Sensor
Result: If "Fuel Position" equals "Rated Fuel Limit" and "Fuel Position" is less than "FRC Fuel Limit", the ECM is providing the correct control.
Continue with this step.
Result: "Intake Manifold Pressure" and "Intake Manifold #2 Pressure" should be approximately 0 kPa (0 psi).
Proceed to Test Step 4.
Result: "Intake Manifold Pressure" and "Intake Manifold #2 Pressure" is not approximately 0 kPa (0 psi).
Replace intake manifold sensor.
4. Check the Fuel Quality
A. Check the fuel analysis.
Cold weather adversely affects the characteristics of the fuel. Refer to the Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold-weather operation.
Fuel
Result: The fuel quality is OK.
Proceed to the Test Step 5.
Result: The fuel quality is NOT OK.
For further information, refer to the engine Operation and Maintenance Manual.
If the problem is not resolved, proceed to the next step.
5. Check the Valve Lash Adjustment
A. Check valve lash.
Valve lash
Result: The valve lash is OK.
Proceed to Test Step 6.
Result: The valve lash is NOT OK.
Refer to Systems Operation/Testing and Adjusting for information related to valve adjustments.
If the problem is not resolved, proceed to the next step.
7. Check the Flash File
A. Check for correct flash file.
Flash file
Result: