Exhaust Has Black Smoke
- Air inlet or exhaust system
- Atmospheric pressure sensor
- Flash file
- Fuel quality
- Valve adjustment
- Check the air inlet system for restrictions and/or for leaks.
- Check for an air filter restriction.
- Perform a visual inspection of the system for restrictions and/or for leaks in the air inlet piping .
- Ensure that the turbocharger is in good repair.
- Check the exhaust system for restrictions.
- Repair any leaks that were found. Remove any restrictions that were found. Replace any damaged components that were found.
- Remove the sensor.
- Remove debris, moisture, or ice from the sensor.
- Install the sensor.
- Check the Caterpillar Electronic Technician (ET) for active diagnostic trouble codes on the sensor. If no active code exists, the sensor may be used. The correct reading for the atmospheric pressure is between
50 kPa (7.25 psi) and100 kPa (14.5 psi) .
Verify that the latest flash file is installed. Refer to Troubleshooting, "ECM Software - Install" for information.
The characteristics of the fuel can be adversely effected by cold weather. Refer to Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold-weather operation.
Check the valve adjustment. Refer to Systems Operation/Testing and Adjusting for information that is related to valve adjustments.
Caterpillar Information System:
C27 and C32 Tier 4 Engines Diagnostic Capabilities
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