3516B Generator Set Engines with Dynamic Gas Blending Caterpillar


Engine Stalls at Low RPM

Usage:

3512 8BR


Use this procedure to troubleshoot an engine that stalls at a low rpm.

Probable Causes

  • Parameters

  • Fuel system

  • Fuel injectors

  • Driven equipment

Recommended 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. 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.
 

Fuel System
 

Result: The fuel system is OK.

Proceed to Test Step 3.

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 3.
 

3. 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 4.

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 4.
 

4. 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).

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