I am having an issue where my fuel gauge is not accuratly reporting the correct amount of gas in the tank. At times, it will show nothing in the tank (at which point the electronic miles to empty will also show 0 miles). Other times it will show a level, but it is not the correct level (such as when I fill the tank, it will not go all the way to the full line). I have taken into a shop and they indicated I need the fuel pump (??) assembly replaced which acutally resides in the tank and it includes the fuel gauge sensor. Quoted me around $800 to repair. Wondering if this is truly the problem, or perhaps something else could be happening.
Check online in other forums of this particular issue. Others may have had the same issue and have found answers through other sites online. Sound like a bad sending unit "fuel gauge sensor". Unfortunatly, it may be a requirement to remove the fuel tank to gain access to this fuel sensor. If you dont have the means to repair this problem you can always keep track by the mileage that you put on your vehicles tripometer. I know thats a pain but it wont cost you any money until you choose to have the repair done.Estimate your mpg's and the size of your fuel tank by the gallons, and multiply the two. Be sure to keep track and have enough fuel not to run out! Its always better to keep half a tank than an eighth of a tank!
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There is a TSB on high sulfur fuel usage, and how it impacts the fuel level resistance. If you change fuel, it might start working again. The TSB is : ERRATIC FUEL GAUGE OPERATION TSB 08-2-9
Publication Date: January 22, 2008 FORD: 2004-2008 F-150 LINCOLN: 2006-2008 Mark LT
ISSUE: Some 2004-2008 F-150 and 2006-2008 Mark LT vehicles, built before 12/3/2007, may exhibit erratic fuel gauge operation or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0460 or P0463, and/or Instrument Cluster Module DTC B1201. This may be caused by sulfur contamination in the fuel causing an open or high resistance in the fuel level sender.
ACTION: Follow the Service Procedure steps to correct the condition.
Install a new fuel level sender following the service procedure instruction sheet provided in the fuel sender kit.
PART NUMBER PART NAME 8L3Z-9A213-E Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-26 Gal Tank - 126/132" WB ) 8L3Z-9A213-F Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-30 Gal Tank - 139" WB) 8L3Z-9A213-G Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-27 Gal Tank - 145/151/163" WB 8L3Z-9A213-H Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-36 Gal Tank - 145/151/163" WB 8L3Z-9A213-A Kit - Fuel Sender (2004 through 2008 - Gas-26 Gal Tank - 126/132" WB 8L3Z-9A213-B Kit - Fuel Sender (2004 through 2008 - Gas-30 Gal Tank - 139" WB 8L3Z-9A213-C Kit - Fuel Sender (2004 through 2008 - Gas-27 Gal Tank - 145/151/163" WB 8L3Z-9A213-D Kit - Fuel Sender (2004 through 2008 - Gas-36 Gal Tank - 145/151/163"WB
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME 080209A 2004-2008 F-150, 2006-2008 Mark LT: Install New Fuel Level Sender, Includes Time To Remove And Install Fuel Tank (Do Not Use With 9002A, 9002A4, 9002A6) 1.9 Hrs.
DEALER CODING BASIC PART NO. CONDITION CODE 9A299 42
sounds like its time for a new sendinding unit, this is the part that hold the fuelpump inside the tank, and has a float arm, this is what tell you how much gas is in the tank, heres a picture of it,this comes with everything even the pump,also make sure to wire in the new connector,these trucks have connector problem,good luck.also check the ground that go to that connector, follow them,may go to rear frame on the leftside, remove and clean them.
this problem is caused by a defective fuel gauge sending unit, the sending unit is inside the gas tank, you must drop the fuel tank out of the car to replace the sender, it is part of the fuel pump module.
Some of these GM's have a seperate fuel guage relay under the dash. Their not cheap. Since you could have anything from a bad sender in the tank to a bad relay its best to leave this to a professional. Next time this happens try smacking the fuel tank a few times hard. If the gauge goes up its most likely a sender in the tank issue. If nothing happens then it really needs to be diagnosed correctly.