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.
HC11 CHECK THE FUEL PRESSURE LEAKDOWN
Note: During output state control, the fuel pump stays commanded on for only about 5 seconds. Be aware that output state control turns the FP off after a calibrated time. If this happens, command the output ON to continue testing.
• Mechanical fuel pressure gauge connected.
• Ignition ON, engine OFF.
• Access the PCM and control the FP (MODE) PID.
• Run the fuel pump to obtain maximum fuel pressure.
• Command the fuel pump OFF.
• Allow the fuel pressure to stabilize.
• Record the stabilized reading.
• Monitor the fuel pressure for 1 minute.
Does the fuel pressure remain within 34 kPa (5 psi) of the recorded reading (MRFS) or greater than 275 kPa (40 psi) (ERFS) after 1 minute?
Yes | No |
|---|---|
For Edge 2.0L, Edge 2.7L, Escape/Kuga 1.6L, Escape/Kuga 2.0L, Expedition, Explorer 2.3L, Explorer 3.5L GTDI, F-150 2.7L, F-150 3.5L GTDI, Fiesta 1.0L, Fiesta 1.6L GTDI, Flex 3.5L GTDI, Focus, Fusion 1.5L, Fusion 2.0L, MKC, MKS 3.5L, MKT 2.0L, MKT 3.5L, MKX 2.0L, MKX 2.7L, | GO to HC12 . |
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.