Intermittent Low Power Or Power Cutout - Perkins NJ Series Troubleshooting Manual

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Troubleshooting Section
Intermittent Low Power or
Power Cutout
Note: Use this procedure only if the engine does not
shut down completely.
Probable Causes
• Diagnostic codes
• Electrical connectors
•
ECM connection
• Fuel supply
• Intake manifold pressure
Recommended Actions
NOTICE
Do not crank the engine continuously for more than
30 seconds. Allow the starting motor to cool for two
minutes before cranking the engine again.
Diagnostic Codes
Check for active diagnostic codes and event codes
on the electronic service tool. Troubleshoot any
active codes before continuing with this procedure.
Electrical Connectors
1. Refer to Troubleshooting, "Electrical Connectors
- Inspect".
2. Repair the electrical connectors or replace the
electrical connectors.
3. Ensure that all the connector seals are in place
and that the connectors have been correctly
installed.
4. Ensure that the repairs have eliminated the fault.
If the fault has not been eliminated proceed to
"ECM Connection".
ECM Connection
1. Check that the P2/J2 connector is correctly
connected.
2. Check that the P1/J1 connector is correctly
connected.
3. If a fault is suspected with the ECM power and
i02535522
ground connections refer to Troubleshooting,
"Electrical Power Supply Circuit - Test".
4. Verify that the ECM connections for the power and
ground connections at the fuel pump are correctly
connected.
5. Repair any faults and ensure that the faults have
been eliminated.
6. If the repairs do not eliminate the faults, proceed
to "Fuel Supply".
Fuel Supply
1. Visually check the fuel tank for fuel. The fuel
gauge may be faulty.
2. Ensure that the fuel supply valve (if equipped) is
in the full OPEN position.
3. If the temperature is below 0 °C (32 °F), check
for solidified fuel (wax).
4. Check the primary filter/water separator for water
in the fuel.
5. Check for fuel supply lines that are restricted.
6. Check that the low pressure fuel lines are tight
and secured properly.
7. Check the fuel filters.
8. Check the diesel fuel for contamination. Refer to
Testing and Adjusting, "Fuel Quality - Test".
9. Check for air in the fuel system. Refer to Testing
and Adjusting, "Air in Fuel - Test".
10. Ensure that the fuel system has been primed.
Refer to Testing and Adjusting, "Fuel System -
Prime".
11. Check the fuel pressure. Start the engine and
then use the electronic service tool to check
that the pressure in the fuel rail is more than
18000 kPa (2610 psi).
12. If the repair does not eliminate the fault refer to
"Intake Manifold Pressure".
Intake Manifold Pressure
1. Use the electronic service tool to verify the intake
manifold pressure.
2. Turn the start switch to the ON position.
SENR9982-01