Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
HC: Fuel Delivery System
HC: Introduction
HC1 CHECK THE SYSTEM INTEGRITY
• Visually inspect the complete fuel delivery system for damage and leakage.
• Check the following:
◾ fuel lines and connections ◾ relays ◾ fuel tank ◾ fuel pump ◾ fuel pressure regulator ◾ fuel rail at injectors ◾ damaged connector pins ◾ electrical connectors not fully engaged
• Verify the vehicle has followed the maintenance schedule. A new fuel filter should have been installed within the last 48,280 km (30,000 miles) (vehicles with inline fuel filter).
• Verify the inertia fuel shutoff (IFS) switch is set (button pushed in). Refer to the Owner's Literature, Roadside Emergencies for the location of the IFS switch (if equipped).
• Verify the fuse integrity.
• Verify the battery is fully charged.
• Verify clean sufficient fuel.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | GO to HC2 . |
HC2 CHECK THE FUEL PRESSURE
• Ignition OFF.
• Relieve the fuel pressure. Refer to the Workshop Manual Section 310-00, Fuel System for the Fuel System Pressure Release procedure.
• Mechanical fuel pressure gauge connected.
• Ignition ON, engine OFF.
• Pressurize the fuel system. Refer to the Workshop Manual Section 310-00, Fuel System for the Fuel System Pressure Release procedure to pressurize the fuel system.
• FP connector connected.
• Cycle the ignition several times to charge the fuel system.
• Compare the fuel pressure reading to the Fuel System Specification Chart.
Is the fuel pressure within range?
Yes | No |
|---|---|
For DTCs P0171, P0174, P2195 or P2197, GO to HC14 . For DTCs P008A or P008B, GO to HC11 . | GO to HC3 . |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.