Full tank of gas, yet guage and light says empty?!
so i went to the rez last night to get gas and smokes, and on the way home, my gas light came on, and the gauge said i had like, 3 needle widths PAST empty. i pulled over, didnt smell nothing, and it was running fine, and then about 10 min later it went away. the thing is, the time between i filled up, and the gas light came on was about 30 minutes, so any clues? ima call the dealer later today.
I always turn off my truck when refilling, and the gas cap would show right away, right? tho i have never changed my fuel sendinding unit, my buddy wanted to a year ago, i told him it works, why mess with it
Neither of the sending units in mine work. Well the one for the rear tank kinda works, but it only reads a half tank when its full, and if I go over any big bumps or smack the top of the dash the needle shakes around and falls right back to empty. :p
mine did the same thing sorta. i filled my tank till the pump stoped, and then i got in and drove off (after paying). looked at the gauge and it said only 3/4 tank. I stopped again and the started the truck and it said full this time.
The float is probably bad on the sending unit in the tank. I just changed mine, the float was full of gas, it developed a small crack in it after 112K. Ford only sells the whole sending unit, but I had one from another truck laying here, so I just swapped the float.
Mine was working fine one day and just quit the next, I had filled it up thinking it was empty and it only took a few dollars. I could here the fuel sloshing in the tank and knew it wasn't empty, so I went right to the sender to see what happened.
To test hte wiring, use a 15 ohm and 150 ohm resistor. Place the resistor in the harness between the yellow/white and ground(black). You can find the harness plug under the driver seat area. Or pull the bed and unplug it at the tank.