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.
• Allow the fuel pressure to stabilize.
• Ignition OFF.
• Ignition ON, engine OFF.
• Compare the FLP PID to the mechanical gauge.
Are the FLP PID values within 153 kPa (22 psi) of the mechanical gauge readings?
Yes | No |
|---|---|
GO to HP4 . | INSTALL a new Fuel Pressure Sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC . REFER to the Workshop Manual Section 310-01, Fuel Tank and Lines. Clear the PCM DTCs. REPEAT the self-test. |
HP4 CHECK FOR LOW PRESSURE FUEL SYSTEM LEAKDOWN
• 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.
• Cycle the ignition several times to charge the fuel system.
• Ignition OFF.
• Wait 15 minutes.
Is the low pressure fuel system pressure greater than 310 kPa (45 psi)?
Yes | No |
|---|---|
GO to HP5 . | GO to Pinpoint Test HC . |
HP5 CHECK THE FUEL INJECTION PUMP RESISTANCE
• Ignition OFF.
• Fuel Injection Pump connector disconnected.
• Measure the resistance between:
( + ) Fuel Injection Pump Connector, Component Side | ( - ) Fuel Injection Pump Connector, Component Side |
|---|---|
FVR | FVRRTN |
Is the resistance between 0.3 - 3.1 ohms?
Yes | No |
|---|---|
GO to HP6 . | INSTALL a new Fuel Injection Pump. |
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.