MOTOR & MTG GP-PISTON 3416362 - Caterpillar

this procedure to troubleshoot an engine that stalls at a low rpm.Probable Causes
Parameters
Air shutoff system (if applicable)
Fuel system
Fuel injectors
Driven equipmentRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Check for Incorrect Configuration Parameters
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Use Cat ET to verify that the correct parameters are being used.
Parameters
Result: The parameters are correct.
Proceed to Test Step 2.
Result: The parameters are not correct.
Repair: Input the correct parameters. Refer to Troubleshooting, "Configuration Parameters" for additional information.
If the problem is not resolved, proceed to Test Step 2.
2. Check for Proper Operation of the Air Shutoff System
Air Shutoff
Result: The air shutoff system is OK.
Proceed to Test Step 3.
Result: The air shutoff system is NOT OK.
Repair: Repair or replace the air shutoff system. Refer to Troubleshooting, "Air Shutoff - Test" for additional information.
If the problem is not resolved, proceed to Test Step 3.
3. Inspect the Fuel System
Refer to Testing and Adjusting, "Fuel System Inspection" for additional information.
A. Visually check the fuel level in the fuel tank. Do not rely on the fuel gauge only.
B. Ensure that the vent in the fuel cap is not filled with debris.
C. Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
Note: Cold weather adversely affects the characteristics of the fuel. Refer to the engines Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold-weather operation.
D. Check fuel quality. Refer to Testing and Adjusting, "Fuel Quality - Test" for additional information. Check the fuel tank for debris or foreign objects which may block the fuel supply.
E. Check for fuel leaks.
F. Check the filtered fuel pressure while the engine is being cranked. Refer to Troubleshooting, "Fuel Pressure Is Low" for additional information.
Fuel System
Result: The fuel system is OK.
Proceed to Test Step 4.
Result: The fuel system is NOT OK.
Repair: Repair or replace damaged fuel system components.
If the problem is not resolved, proceed to Test Step 4.
4. Test the Fuel Injectors
A. Connect Cat ET.
B. Use Cat ET to perform the following fuel injector tests:
- "Injector Solenoid Test"
- "Cylinder Cutout Test"
Refer to Troubleshooting, "Cat ET Service Features" for additional information.
Fuel Injectors
Result: The tests were successful.
Proceed to Test Step 5.
Result: The tests were not successful.
Repair: Diagnose the problem. Repair or replace damaged components.
If the problem is not resolved, proceed to Test Step 5.
5. Inspect the Driven Equipment
Driven Equipment
Result: The driven equipment is NOT OK.
Repair: Repair or replace damaged driven equipment.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).