Engine Stalls at Low RPM
Probable Causes
- Active codes and logged codes
- Incorrect parameters
- Air shut-off system (if applicable)
- Fuel system
- Fuel injectors
- Engine accessories
- Parasitic loads
Recommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Show/hide table
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
| 1. Check for Codes A. Connect Cat® Electronic Technician (ET) to the service tool connector. B. Look for active codes that are associated with the system for the event code. |
Codes |
Result: An associated code is active. Repair: Troubleshoot any associated codes before continuing with this test. Result: A code is active or logged. Proceed to Test Step 2. |
2. Check for Incorrect Parameters A. Use Cat ET to verify that the correct parameters are being used. Refer to Troubleshooting, "Configuration Parameters" for additional information. |
Parameters |
Result: The correct parameters are being used. Proceed to Test Step 3. Result: The correct parameters are not being used. Repair: Configure the correct parameters. Verify that the repair eliminated the problem. |
3. Inspect the Air Shutoff System (if applicable)) A. Check for proper operation of the air shutoff system. Refer to Troubleshooting, "Air Shutoff - Test". |
Air Shutoff |
Result: The air shutoff is operating correctly. Proceed to Test Step 4. Result: The air shutoff is not operating correctly. Repair: Make the necessary repairs. Verify that the repair eliminated the problem. |
4. Check the Fuel System A. Visually check the fuel level in the fuel tank. Do not rely on the fuel gauge only. B. Ensure that the fuel supply valve (if equipped) is in the full OPEN position. C.. Inspect the fuel system. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Inspect" for additional information. 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 Systems Operation/Testing and Adjusting, "Fuel Quality - Test" for the proper procedure. Check the fuel tank for debris or foreign objects which may block the fuel supply. E. Check the filtered fuel pressure while the engine is being cranked. Refer to Troubleshooting, "Fuel Pressure Is Low" for the proper testing procedure. |
Fuel System |
Result: The fuel system is operating properly. Proceed to Test Step 5. Result: The fuel system is not operating properly. Repair: Make the necessary repairs. Verify that the repair eliminates the problem. |
5. Test the Fuel Injectors If service has been performed on the engine fuel system recently, verify that the injector trim files are correct. Use Cat ET to check that the injector trim files are correct for the injectors that are installed on the engine. A. Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM. B. Access the "Cylinder Cutout Test" in the "Diagnostic Tests" under the "Diagnostics" menu. C. Perform the "Automatic Cylinder Cutout Test" on Cat ET. |
Fuel Injector |
Result: The test was successful. Proceed to Test Step 6. Result: The test was not successful. Repair: Diagnose the problem and then repair the problem. Reset all active codes and clear all logged codes. Verify that the repair eliminated the problem. |
6. Check the Engine Accessories A. Inspect any engine accessories and the transmission (if applicable). |
Engine Accessories |
Result: An engine accessory is creating an excessive load. Repair: Repair the engine accessory. Verify that the repair eliminated the problem. |
Caterpillar Information System:
Caterpillar Advanced Ride Management (CARM) Seat Suspension System Troubleshooting
415F2 Backhoe Loader Monitoring System
MH3022, MH3024 and MH3026 Material Handlers Sensor Signal (PWM) - Test
C27 and C32 Engines for Caterpillar Built Machines Engine Has Mechanical Noise (Knock)
735C and 745C Articulated Trucks Specifications
Procedure to Update the Low-Pressure Fuel System on Certain 797F Off-Highway Trucks {1251, 1255, 1256, 1261, 1273, 1274, 1290, 1408, 1439} Procedure to Update the Low-Pressure Fuel System on Certain 797F Off-Highway Trucks {1251, 1255, 1256, 1261, 1273, 1274, 1290, 1408, 1439}
C175-16 Engines for Off-Highway Truck/Tractors Clean Fuel Module - Test
735C and 745C Articulated Trucks Shipping the Machine
259D, 279D, 289D, 299D and 299D XHP Compact Track Loaders, 257D, 277D, 287D, 297D and 297D XHP Multi Terrain Loaders and 236D, 242D, 246D, 262D, 272D and 272D XHP Skid Steer Loaders Power Train Piston Motor (Hydrostatic) - Assemble - Two Speed SSL
259D, 279D, 289D, 299D and 299D XHP Compact Track Loaders, 257D, 277D, 287D, 297D and 297D XHP Multi Terrain Loaders and 236D, 242D, 246D, 262D, 272D and 272D XHP Skid Steer Loaders Power Train Piston Motor (Hydrostatic) - Disassemble - Two Speed SSL
Procedure to Update the Low Pressure Fuel System on Certain 795F AC Off-Highway Trucks {1251, 1255, 1256, 1261, 1273, 1274, 1290, 1408, 1439} Procedure to Update the Low Pressure Fuel System on Certain 795F AC Off-Highway Trucks {1251, 1255, 1256, 1261, 1273, 1274, 1290, 1408, 1439}
C4.4 and C7.1 Engines Electronic Service Tools
C27 and C32 Engines for Caterpillar Built Machines Exhaust Has Excessive Black Smoke
735C and 745C Articulated Trucks Engine Compression Brake Valve Lash - Check
451-0130 Swing Gear Inner Bearing Seal Installation Tool{0374, 0599, 0700, 0745, 7063} 451-0130 Swing Gear Inner Bearing Seal Installation Tool{0374, 0599, 0700, 0745, 7063}
745 Articulated Truck Brake Oil Filter - Replace
2014/11/06 Procedure to Rework the Transmission Mounting bolts Now Available for Certain R1700G Load Haul Dump Machines {3030}
RM500B Reclaimer Mixer Machine Systems Piston Pump (Auxiliary)
RM500B Reclaimer Mixer Machine Systems Lines (Mixing Chamber Tilt Cylinder)
C4.4 and C7.1 Engines Service Information Report
C4.4 Engines System Overview
RM500B Reclaimer Mixer Machine Systems Cab - WIRING
C7.1 Engines Component Location
PM310, PM312 and PM313 Cold Planer Machine Systems Pump Control Valve