Gas Gange stuck on FULL

[Seashells]

My husband has a 2001 F350 Diesel. Ever since we have had it, the gas gange always says FULL. What could the problem be and how do we fix it?

Thanks!

[Rodslinger]

Welcome to Powerstroke.org Seashells! I moved your thread over to the '99 to '03 problems forum. One of our other moderators (Farmboy) has a similar problem and was looking to drop his tank and check it out. Here is the link to his post;

http://www.powerstrokeforum.com/foru...ght=stuck+full

If he's already fixed his I'm sure he can shed some light on what the problem could be.

[wesjones]

is the truck parked on an angle all the time...if so the float may have been getting lifted by uneven fuel in the tank and sticking

[99Smokin73Stroker]

Welcome to the forum!! Occasionally my guage will go all the way up to full when I know it's nowhere near full. It's done it a few times intermittently the past few months. It reads true after I turn it off and back on most of the time. My buddy told me my sending unit is likely going bad. Maybe yours is bad, not sure!

[mschn99]

a fuel gauge stuck on full is usually a bad sending unit(has an open in the circuit). the sending unit has resistance in it, and the lower the resistance, the lower the gauge is. the resistance is set by a floating rod in the fuel tank. it is a relatively simple test if you have a volt/ohm meter.....if you have this electrical testing tool, let me know and ill help you find out if its the gauge or the sending unit.

[DJM]

Yup it's the sending unit it happned to me a few months ago. luckily I still had a few miles left on my warenty.