Question about 2003 Dodge Durango

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When tank reaches the 1/4 mark it stays on 1/4 mark, so i have ran out of gas twice now.

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  • Contributor
  • 31 Answers

It could be a bad float in your fuel tank.

Hope this helps

Posted on Aug 07, 2010

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  • Dodge Master
  • 2,019 Answers

The tank sending unit is a variable resistor, with an arm that swings across a coil of resistance wire.
Eventually the wire breaks, and after that the gauge will not read beyond the break.

To check if the tank unit or the gauge is at fault, pull the wire from the tank sending unit and ground it.
The dash gauge should then peg to the top.
With the wire ungrounded, the dash gauge should drop to the bottom.

If that is ok, then the tank sending unit is likely the problem.
It is usually in the top of the tank, and is held in either by a rotated ring with small ramps almost like a radiator cap, or a circle of small screws. If there is no hatch to access the sending unit without dropping the tank, I often make my own. If you do, first look at one in a junk yard, to see where to make the hatch cuts, and use something like a small cutoff wheel that you can prevent from hitting the tank. Make it big enough so you can manipulate the float out the hole. Then bolt reinforcing strips on edges to hold the hatch back down when you are done, and seal with duct tape. (careful of the sharp edges)

Posted on Aug 08, 2010

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from what you are describing you have two(2) different problems
1- the wacky gauge- its acting like a grounding issue- wires are crushed/smashed on tank connector
2- not filling - venting issue- vent line to top of tank pinched
3 solution- run tank down to 1/4 or less and DROP tank down to inspect wires and hoses- sounds like at some point in time the tank took a hit and wedged itself upwards against the underside,pinched the vent line so there is too much pressure in tank and also crushing the wires/plug causing the erratic readings(worse with less weight as the tank moves more)
if unsure of how to do this- you can get a manual such as a HAYES book at auto parts story- good luck

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