CUMMINS N14 - Engine Decelerates Slowly (PT Fuel System)

Engine Decelerates Slowly (PT Fuel System)
Cause Corrections
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Throttle Return Spring or Linkage Binding
OK
f
Check for free movement and adjust if
necessary. Refer to Procedure 5-02.
----------
Fuel Drain Line Restriction
OK
f
Check for loops and restricted fittings.
Refer to Procedure 5-19.
----------
Fuel Tank Vents Plugged
OK
f
Remove and clean. Replace as necessary.
----------
Overhead Fuel Tank Check Valve Re-
stricted or Not Opening (Industrial
Applications)
OK
f
Valve must open at 2 kPa [0.3 psi].
Incorrectly plumbed. Refer to Fuel System
Miscellaneous Information in Section 5.
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Fuel Rail Line or Fuel Rail Test Instrumenta-
tion Gauge Line Excessively Long, Large in
Diameter, or Entrained With Air Causing it to
Act as an Accumulator
OK
f
Visually inspect the fuel rail pressure lines
for misinstallation. Remove rail pressure line
and/or gauge line and bleed air. Check
again. Replace lines as necessary.
----------
Air in the Fuel
OK
f
Check for air in the fuel. Tighten the fuel line
connections and fuel filter(s). Check tank
pipe stand. Refer to Procedure 5-16. Check
PT fuel pump road speed governor (STC
only). Refer to Procedure 5-05.
----------
PT Fuel Pump Throttle Leakage Excessive
OK
f
Remove PT pump. Refer to Procedure 5-02.
Calibrate on test stand. Refer to PT Fuel
Pump Rebuild and Calibration Manual,
Bulletin No. 3379084.
(Continued)
Troubleshooting Symptoms Charts SectionT-Troubleshooting
N14Page T-32