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.
Original table alignment retained · Scroll horizontally if needed
HX42 CHECK THE FTP SENSOR VOLTAGE WITH THE FUEL FILLER CAP REMOVED OR THE CAPLESS FUEL TANK FILLER PIPE OPENED
• For vehicles with a capless fuel filler pipe,
• Install the supplemental refueling adaptor provided with the vehicle to open the capless fuel tank filler pipe.
• For all others,
• Remove the fuel filler cap.
• Ignition ON, engine OFF.
• Access the PCM and monitor the FTP (VOLT) PID.
Is the voltage between 2.1 - 2.9 V?
Yes | No |
|---|---|
GO to HX43 . | INSTALL a new FTP sensor. REFER to the Workshop Manual Section 303-13, Evaporative Emissions. REPEAT the test and VERIFY the results. For repair verification, CARRY OUT the Smoke Machine PHASE 1 - Leak Verification Pressure Test. GO to HX44 . |
HX43 EVAP PURGE VALVE TEST
• Ignition OFF.
• Install the fuel filler cap or remove the supplemental refueling adaptor.
• Ignition ON, engine running.
• Access the PCM and control the EVAPCV (MODE) PID.
• Close the EVAP canister vent valve by commanding the EVAPCV PID to ON (100% duty cycle).
• Access the PCM and monitor the FTP (PRESS) PID.
• Access the PCM and control the EVAPCP (PER) PID.
• While monitoring the FTP PID, ramp open the EVAP purge valve by incrementally commanding the EVAPCP PID to 100%.
Does the FTP PID decrease, the engine RPM change, or the engine stall as an indication that the EVAP purge valve is opening?
Yes | No |
|---|---|
GO to HX44 . | INSTALL a new Evaporative Emission (EVAP) Purge valve. REFER to the Workshop Manual Section 303-13, Evaporative Emissions. REPEAT the test and VERIFY the results. |
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.