Sky L4-2.4L (2007)
* Restricted fuel feed pipe
* Restricted or plugged strainer
* Inspect the harness connectors and the ground circuits of the fuel pump for poor connections.
1. Verify that the fuel pressure does not decrease more than 34 kPa (5 psi) in 5 minutes.
‹› If the fuel pressure decreases more than the specified value, perform the following procedure:
1. Ignition OFF, relieve the fuel pressure. Refer to Fuel Pressure Relief (With CH 48027-100) Fuel Pressure Relief (Without CH 48027-100).
2. Disconnect the chassis fuel feed hose from the engine compartment fuel pipe.
3. Connect the chassis fuel feed hose to the inlet side of SA9127E-7 using the J 43937.
4. Connect the engine compartment fuel pipe to the ON/OFF valve side of the SA9127E-7 using the J 43937.
5. Cap the pressure test port on the SA9127E-7 with the J 43936.
6. Open the valve on the SA9127E-7.
7. Ignition ON, command the fuel pump relay ON with a scan tool and bleed the air from the CH-48027-100.
8. Command the fuel pump relay ON for a minimum of 10 seconds with a scan tool.
9. Close the valve on the SA9127E-7.
10. Monitor the fuel pressure for 1 minute.
‹› If the fuel pressure decreases more than 34 kPa (5 psi) within the specified time, locate and replace the leaking fuel injector(s).
‹› If the fuel pressure does not decrease more than 4 kPa (5 psi) within the specified time, replace the fuel pump module.
2. Relieve the fuel pressure to 69 kPa (10 psi). Verify that the fuel pressure does not decrease more than 14 kPa (2 psi) in 5 minutes.
‹› If the fuel pressure decreases more than the specified value, replace the fuel pump module.
3. Operate the vehicle within the conditions of the customer's concern while monitoring the fuel pressure with the CH-48027-100. The fuel pressure
should not drop off during acceleration, cruise, or hard cornering.
‹› If the fuel pressure drops off, test, inspect, and repair the items listed below. If all items test normal, replace the fuel pump module.
* Restricted fuel feed pipe
* Restricted or plugged strainer
* Inspect the harness connectors and the ground circuits of the fuel pump for poor connections.
4. If the fuel system tests normal, refer to Symptoms - Computers and Control Systems. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Controls
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests and Procedures
* Fuel Hose/Pipes Replacement - Chassis
* Fuel Injector Replacement
* Fuel Pump Fuel Feed Hose Replacement
* Fuel Pump Module Replacement
