Smoke, Black - Excessive - Performance Measurement
NOTE: After conducting the performance test, use this chart to analyze the performance data.
Cause Corrections
----------
Intake Air Restriction Excessive
OK
f
Clean/replace air filter element or
damaged air intake piping.
----------
Fuel Drain Line Restricted
• Without Check Valve 65 mm Hg [2.5 in Hg]
• With Check Valve 165 mm Hg [6.5 in Hg]
OK
f
Inspect fuel return system for loops, swelled
lines, or clamped points. Replace/reroute fuel
lines. Verify fuel tank vents are not blocked,
plugged, or corroded.
----------
AFC ‘‘No-Air’’ Screw Adjustment/Dual
Spring AFC Plunger Position Incorrect
OK
f
Check/adjust the AFC ‘‘No-Air’’ setting.
Refer to Procedure 5-20.
----------
VS Governor Adjustment Incorrect
OK
f
Check/adjust VS governor. Refer to PT
PACER Compulink™ Cartridge Manual,
Bulletin No. 3810443.
----------
Fuel Rate Low, Fuel Pressure High,
Intake Manifold Pressure OK or Low
OK
f
Clean/flush injectors. Replace if
necessary. Refer to Procedure 5-10.
----------
Injector Cups or Nozzles Eroded or
Damaged and/or Injector Defective
OK
f
• Hold down injector at idle. Observe change
in smoke level. Replace bad injector.
• Perform cylinder cut out test or cylinder
performance test.*
----------
Fuel Rate High, Fuel Pressure OK,
Intake Manifold Pressure OK**
OK
f
Rebuild or replace injectors. Refer to
Procedure 5-10.
(Continued)
* Compulink™ required
** CELECT™ engines only
Troubleshooting Symptoms Charts SectionT-Troubleshooting
N14Page T-96
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