Fuel Pressure Is High
The probable causes of high fuel pressure
- Fuel pressure sensor
- Fuel lines
- Fuel transfer pump
- Fuel return pressure regulator
Note: High fuel pressure may cause high fuel temperatures. Troubleshoot a code for high fuel pressure before troubleshooting a code for high fuel temperature.
Use this procedure in order to troubleshoot high fuel pressure. Use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".
Show/hide table
Diagnostic Trouble Codes | ||
---|---|---|
J1939 Code | Code Description
(code descriptions may vary) |
Comments |
5580-16 | Engine Filtered Fuel Delivery Absolute Pressure : High - moderate severity (2) | The code is logged.
The fuel pressure is above the trip point pressure. |
Show/hide table
Troubleshooting Test Steps | Values | Results |
---|---|---|
1. Determine the Code A. Connect Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary. B. Determine if a diagnostic trouble code is present. |
Diagnostic trouble code |
Result: A 5580-16 code is present. Proceed to Test Step 2. Result: A code other than 5580-16 code is present. Troubleshoot the code. Refer to the proper troubleshooting procedure. |
Show/hide table
Required Tooling | |
8t-7860 Connector | |
110-6349 Fitting as | |
8t-0855 Pressure Gauge | |
6v-3990 Coupler |
Show/hide table
Illustration 1 | g02893220 |
(1) Fuel temperature sensor
(2) Fuel sampling port (3) Fuel pressure sensor (4) Secondary fuel filter base |
Do not use the fuel sampling port (2) for measuring the pressure. Follow the steps below.
Show/hide table
Troubleshooting Test Steps | Values | Results |
---|---|---|
2. Check the Fuel Pressure Sensor A. Record the fuel pressure from Cat ET. Record the data in Table 5. B. Remove the fuel pressure sensor (3). C. Install an 8T-7860 Connector into the port of the pressure sensor (3). D. Install the 110-6349 Fitting as onto the 8T-7860 Connector. E. Install a 8T-0855 Pressure Gauge onto a 6V-3990 Coupler. F. Install the 6V-3990 Coupler onto the 110-6349 Fitting as. After the pressure sensor is removed, a code for low fuel pressure will become active. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position, after the sensor is reinstalled. G. Record the fuel pressure on the pressure gauge. Record the data in Table 5. |
Fuel pressure |
Result: The gauge value of the fuel pressure is within Proceed to Test Step 3. Result: The gauge value of the fuel pressure is not within Replace the pressure sensor. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. Verify that the problem has been resolved. If the problem is not resolved, proceed to Test Step 3. |
Show/hide table
Engine RPM | Fuel pressure from Cat ET | Fuel pressure from the mechanical gauge |
800 | ||
1800 |
Show/hide table
Illustration 2 | g02893396 |
Fuel supply lines |
Show/hide table
Illustration 3 | g02893278 |
Return fuel line |
Show/hide table
Troubleshooting Test Steps | Values | Results |
---|---|---|
3. Inspect the Fuel Supply Lines A. Visually inspect the fuel lines between the primary filter base and the inlet to the cylinder head. Also, inspect the fuel cooler, if equipped. Inspect the fuel return line from the head to the fuel tank. Inspect the lines for restrictions, pinching, and swelling. |
Restrictions, pinching, and swelling |
Result: The fuel lines and the cooler (if equipped) are OK. Proceed to Test Step 4. Result: The fuel lines and the cooler (if equipped) are not OK. Make the necessary repairs. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. Verify that the problem has been resolved. If the problem is not resolved, proceed to Test Step 4. |
Show/hide table
Illustration 4 | g02893398 |
(5) Return fuel pressure regulator |
Show/hide table
Troubleshooting Test Steps | Values | Results |
---|---|---|
4. Replace the Return Fuel Pressure Regulator A. Replace the fuel pressure regulator. |
Fuel pressure regulator |
Result: The regulator was replaced. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. Verify that the problem is resolved. If the problem is not resolved, proceed to Test Step 5. |
Show/hide table
Illustration 5 | g02893400 |
Typical fuel transfer pump (6) Relief valve |
Show/hide table
Troubleshooting Test Steps | Values | Results |
---|---|---|
5. Inspect the Relief Valve for the Fuel Transfer Pump A. Inspect the relief valve for the transfer pump. The spring must move freely. |
Relief valve |
Result: The relief valve is stuck closed. Replace the fuel transfer pump. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. Verify that the problem has been resolved. Result: The relief valve is OK. Clean the relief valve and reinstall the relief valve. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. Verify that the problem has been resolved. |
Complete the procedure in the order in which the steps are listed.
Caterpillar Information System:
C13 Industrial Engine Fuel Consumption Is Excessive
C13 Industrial Engine Exhaust Temperature Is High
C13 Industrial Engine Exhaust System Contains Oil
3500 Generator Sets Maintenance Interval Schedule - High Displacement
3500 Generator Sets Maintenance Interval Schedule - Prime Power
793F Off-Highway Truck Fuel Correction Factor - Set
2014/11/14 New EMCP 3.2/3.3 Software Is Now Available For Use On Certain Cat® Products {4490, 7620}
3500 Generator Sets Maintenance Interval Schedule - Standby
Installation Procedure to Retrofit a 471-1985 Swivel Guard Upgrade Kit on Certain Excavators {7153} Installation Procedure to Retrofit a 471-1985 Swivel Guard Upgrade Kit on Certain Excavators {7153}
C4.4 Engines General Information
3512E Tier 4 Final Engines for Land Electric Drilling Sensor Signal (Analog, Active) - Test
C280-08 Tier 4 Engine Fuel Priming Pump - Remove and Install
2014/12/19 A New Hazardous Location Customer Connection Harness Is Available for Certain C9, C15, and C32 Commercial Engines {1408, 1900}
C13 Industrial Engine Fuel Temperature Is High
C13 Industrial Engine Idle Speed Is High
C13 Industrial Engine Inlet Air Is Restricted
C13 Industrial Engine Intake Manifold Air Temperature Is High
C13 Industrial Engine NOx Conversion Is Low
C13 Industrial Engine NRS Exhaust Gas Temperature Is High
C13 Industrial Engine Oil Consumption Is Excessive
2014/12/12 New Compressor Bypass Valves and Software Are Used on Certain G3500 Engines {1803, 1920, 5510}
C280 Marine Engines Dosing Control System Operation
C280-08 Tier 4 Engine Engine Oil Filler and Oil Level Gauge - Remove and Install
C280 Marine Engines Diesel Exhaust Fluid Quality - Test