Acceleration Is Poor or Throttle Response Is Poor
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C9.3 Engines for Caterpillar Built Machines
[KENR5393]
C9.3 Engines for Caterpillar Built Machines
Power Is Intermittently Low or Power Cutout Is Intermittent
C9.3 Engines for Caterpillar Built Machines
Injector Solenoid - Test
ELECTRICAL AND STARTING SYSTEM
C9.3 Engines for Caterpillar Built Machines
Acceleration Is Poor or Throttle Response Is Poor
C9.3 Engines for Caterpillar Built Machines
Component Location
- Codes
- Parameters
- Throttle Signal
- Air Inlet and Exhaust System
- Fuel System
- Engine Load
- Valve Lash
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| Troubleshooting Test Steps | Values | Results |
1. Codes A. Check for codes |
Codes |
Result: A diagnostic code is present. Repair: Troubleshoot the code and make repairs. Result: A diagnostic code is not present. Proceed to Test Step 2. |
| 2. 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 parameters are correct. Proceed to Test Step 3. Result: The parameters are not correct. Repair: Input the correct parameters. Refer to Troubleshooting, "Configuration Parameters" for additional information. |
| 3. Throttle Signal A. Monitor the status for "Throttle Position" on Cat ET. Verify that the status for "Throttle Position" is stable and that the engine is able to reach high idle speed. |
Throttle Signal |
Result: The throttle signal is stable.
Proceed to Test Step 4. Result: The throttle signal is not stable. Repair: Make the necessary repairs, Refer to the appropriate circuit test. |
| 4. Restriction in the Air Inlet and Exhaust System A. Observe the check engine lamp. Check for an air filter restriction indicator. Replace any plugged air filters. Refer to the Operation and Maintenance Manual. B. Check the air inlet and exhaust system for restrictions and/or leaks. |
Restrictions |
Result: There are no restrictions in the air inlet or exhaust system. Proceed to Test Step 5. Result: There are restrictions in the air inlet or exhaust system. Repair: Make the necessary repairs, Refer to Systems Operation/Testing and Adjusting, "Air Inlet and Exhaust System - Inspect" for additional information. |
| 5. Check the Fuel System Refer to Systems Operation/Testing and Adjusting, "Fuel System" 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. D. Inspect the fuel system. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Inspect" for additional information. E. 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. Cold mode (if applicable) is activated whenever the engine coolant temperature falls below a predetermined value. Monitor the status screen on Cat ET in order to verify that the engine has exited cold mode. Observe the reading for coolant temperature on the Cat ET. Refer to "Cold Mode Operation" within the Systems Operation, "General Information". F. 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. G. Check for the proper operation of the fuel transfer pump. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for test information. |
Fuel system |
Result: The fuel pressure is OK. Proceed to Test Step 6. Result: The fuel pressure is not OK. Repair: Replace the fuel filters. Clean the primary filter/water separator of debris. Refer to the Operation and Maintenance Manual for details. |
| 6. Engine Load A. Check accessories and parasitic loads on the engine. |
Engine loads | Result: There is not a parasitic load. Proceed to Test Step 7. Result: There is a parasitic load. Repair: Remove the parasitic load. |
| 7. Valve Lash A. Check the valve lash. The valve lash can affect the performance of the engine. |
Valve lash | Result: The valve lash is not set correctly. Repair: Set the valve lash. Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure. |
Information System:
C9.3 Engines for Caterpillar Built Machines
Power Is Intermittently Low or Power Cutout Is Intermittent
C9.3 Engines for Caterpillar Built Machines
Oil Consumption Is Excessive
C9.3 Engines for Caterpillar Built Machines
Inlet Air Is Restricted
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators
Boom/Stick/Bucket Combinations
C9.3 Engines for Caterpillar Built Machines
Unit Injector Sleeve - Install
C9.3 Engines for Caterpillar Built Machines
Engine Stalls at Low RPM
C9.3 Engines for Caterpillar Built Machines
Engine Overspeeds
C13, C15, and C18 Tier 4 Interim Engines
Fuel System Water Separator Has Water
C9.3 Engines for Caterpillar Built Machines
Engine Misfires, Runs Rough or Is Unstable
C9.3 Engines for Caterpillar Built Machines
Engine Has Early Wear
C9.3 Engines for Caterpillar Built Machines
Unit Injector Sleeve - Remove
C9.3 Engines for Caterpillar Built Machines
Engine Does Not Crank
C9.3 Engines for Caterpillar Built Machines
Injector Solenoid - Test
3500 and 3500B High Displacement Engines for Caterpillar Built Machines
Aftercooler - Remove and Install - High Altitude Arrangement
390D Excavator Hydraulic System
Control Valve (Stick Lowering)
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Blade Cylinder - Remove and Install
303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine Systems
Blade - Remove and Install
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Bucket Linkage - Remove and Install
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Bucket Cylinder - Remove and Install
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Stick Cylinder - Remove and Install
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Stick - Remove
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Stick - Install
303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems
Load Control Valve (Boom Cylinder) - Remove and Install
2011/06/29
A New Halogen Lamp Is Now Available for Certain Cat Products {1434}