F 150 Super Crew 2WD V8-5.4L SOHC VIN L (2001)
by 1/4 and 1/8 turn increments clockwise or counterclockwise as in step 14 repeating steps 10 through 12 with each adjustment until both O2S
PIDs display equal high state time.
19. When the retrieved PCM PIDs O2S11 and O2S21 data display equal high state time, the alternate fuel system is correctly tuned and no further
adjustment is required. Document the following information: VIN, date, lead technician, assistant, O2S bank number adjusted, required number of
turns to adjustment screw (to nearest 1/8th turn).
20. Turn the ignition switch to the OFF position and remove the vacuum gauge and restore the intake vacuum system.
21. Paint mark the tuning tee adjustment screw positions and seal the access hole with a manufacturers sensor safe sealant. Cover and label the
adjustment screw cavities indicating that the alternative fuel system tuning procedure has been performed. Update all necessary vehicle inspection
labels and placards.
