Technical Data-Fuel System Pressure Specifications
WARNING: This page is about a different car, the 2024 Jeep Grand Cherokee L. However, it is still accessible from the selected car via links, so may be relevant.
The table below shows the fuel system pressure specifications.
| VARIABLE FUEL PRESSURE SYSTEM SPECIFICATIONS (6.2L ENGINES) | ||
| CRANKING | 520 kPa (75.4 psi) | System operates in open loop during cranking. |
| IDLE | 340 - 400 kPa (49 - 58 psi) | Normal operating range at idle - Pressure is dependant on ambient and fuel temp. Pressure is raised during high temp to prevent boiling. |
| NORMAL RANGE OF OPERATION | 340 - 550 kPa (49 - 80 psi) | Normal operating range between idle and high engine demand. |
| 100% DUTY CYCLE | 600 - 700 kPa (87 - 101.5 psi) | This is regulated by the pressure relief valve in the Fuel Pump. The pressure can vary from pump to pump. |
| 4 CYLINDER (1.0L/1.3L GSET / 2.0L GMET ENGINES) | ||
| CRANKING | 580 kPa (84.1 psi) | System operates in open loop during cranking. |
| ALL OTHER OPERATING CONDITIONS | 520 kPa (75.4 psi) | The fixed pressure systems should maintain approximately 75.0 psi during normal operation. |
| 6 CYLINDER (3.0L GMET ENGINES) | ||
| CRANKING | 650 - 660 kPa (94.2 - 95.7psi) | System operates in open loop during cranking |
| ALL OTHER OPERATING CONDITIONS | 600 kPa (87 psi) | The fixed pressure systems should maintain approximately 87 psi during normal operation. Periodically, with the engine @ idle, the pressure is bumped up to 650 - 660 kPa (94.2 - 95.7psi) to check for a stuck fuel rail pressure sensor signal. |
| FIXED PRESSURE SYSTEM SPECIFICATIONS (ALL OTHER ENGINES) | ||
| The fixed pressure systems should maintain approximately 400 kPa (58.0) psi during normal operation | ||
GENERIC SYSTEM SCHEMATIC: