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.
( + ) FP Connector, Harness Side ( - ) Vehicle Battery
FPPWR | Negative terminal |
• Access the PCM and control the FP (MODE) PID.
• Command the fuel pump ON.
Does the voltage increase with the PID commanded ON?
Yes | No |
|---|---|
For Vehicles that do not start, GO to HC15 . For all others, GO to HC11 . | For KA, and EcoSport, REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. For all others, GO to Pinpoint Test KC . |
HC5 CHECK THE SEPARATION LEVEL OF THE ETHANOL/WATER MIXTURE AND GASOLINE IN THE FUEL
Note: This step requires the use of a locally obtained 200 ml beaker and a 25 ml graduated cylinder.
Note: After approximately 3 minutes of standing, the ethanol and water mixes together and settles to the bottom of the 25 ml graduated cylinder. The gasoline rises to the top.
• Fill the 200 ml beaker with 5 ml of clean water.
• Use the pressure relief valve on the mechanical fuel gauge to drain 22 ml of fuel into an approved clean container.
• Pour 20 ml of fuel from the approved clean container into the 25 ml graduated cylinder.
• Add enough water from the 200 ml beaker to the 25 ml graduated cylinder to bring the total volume of liquid to 24 ml.
• Insert a stopper plug in the opening of the 25 ml graduated cylinder.
• Firmly hold the stopper in place and shake the 25 ml graduated cylinder to mix the water and fuel.
• Allow the liquid to stand and separate for approximately 3 minutes.
• Record the separation level from the 25 ml graduated cylinder where the ethanol/water mixture and gasoline meet.
Did the ethanol/water mixture and gasoline separate?
Yes | No |
|---|---|
GO to HC6 . | The ethanol/water mixture will separate from the gasoline. If the fuel does not appear to separate, then the fuel is either 100% ethanol or a mixture of ethanol and water. REPLACE the contaminated fuel. Clear the PCM DTCs. REPEAT the self-test. |
HC6 CALCULATE THE PERCENTAGE OF ETHANOL IN THE FUEL
Note: Use the illustration as an example for calculating the percentage of ethanol in the following steps. If the separation level is at 14 ml the calculation becomes; 14 minus 4, then multiply by 5 to equal 50. The percentage of ethanol in the fuel is 50%.
• Ignition OFF.
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.