F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
4. Set the fuel selector switch to "ALT" and run the vehicle until the indicator lamp goes out.
5. To pressurize the system, reverse the procedure.
4. Set the fuel selector switch to "ALT" and run the vehicle until the indicator lamp goes out.
5. To pressurize the system, reverse the procedure.