CM870 Black Smoke on high altitude

[hhow55]

Excessive black smoke.
Conditions :
n/a

Action Specification/Repair Next Step
Interview the driver and verify the complaint.

n/a

Is the engine symptom Excessive Black Smoke?

YES

Repair :

Perform the troubleshooting steps in the recommended order listed below:

Step 6 - Air Handling Checks
Step 4 - Fuel System Checks
Step 5 - Injector Checks
With EGR - Step 7 - EGR Checks
With EGR - Step 10 - EGR Differential Pressure and Exhaust Gas Pressure Checks
Step 9 - Base Engine Checks.
Perform the troubleshooting steps suggested in the repair procedure
Is the engine symptom Excessive Black Smoke?

NO
2D