by any chance to know what the ohm reading would be for that model for full and empty?

 

ok so they put a new fuel pump in so lets see if that makes a differenc.

 

Ok, so they replaced the fuel pump and I filled the tank. Same issue gauge is off by little more than 1/4 tank. Since the sending unit if on the pump I imagine it can't be that. It only started happening after the pump was replaced the first time. What else can it be?

 

One thing that could be done,
The repairing shop could remove the module and measure the distance the float has to travel in the tank and compare the readings at the gauge in the dash. The rod that holds the float can be adjusted to provide the correct reading for the empty and full positions.

 

Ok so a few questions. I filled the tank a few times the gauge is off my a little more than 1/4 tank from what I can see. I watched a few videos about the removal and replacement of the pump. How do you adjust the float on the pump? I have not seen the actual pump but one would think it would come calibrated correctly if you order it by the VIN which they did. I am on the second pump now and have the same issue. Can you tell me how do you move the float lever itself up? I know it has to go up as i can see when the truck is being filled up the gauge hits F way before the gas pump at the station turns off.

 

The gauge section and the fuel pump module are one unit, so the fuel pump module has to be removed or lifted out of the fuel tank in order to bend the float arm to position the wiper in the more correct position. If for instance the reading is hitting full before the tank is actually full, the float rod needs to be bent up so the position of the wiper that provides the reading level is lower. Very simple to do
. I cannot say that the rod might have been bent at the time of installation, but that does happen.
If the position is verified at the time the module is installed it saves all this trouble. As you know,,,,,,,all new parts don't always work perfectly when there is the possibility of something being altered on installation.

 

got it, just wanted to know if there was any way to do it besides bending it. It has to go up as its showing empty when there is almost a half tank. This is the second pump doing the same thing, so I will tell them to bend it up slightly. thanks

 

I hope you have good luck with passing on that info. I know you understand it, but after 2 times , I don't know !

 

So the mechanic put an OEM pump in and the problem went away. Why 3 different after market pumps were not calibrated correctly is beyond me but that was what fixed the issue.

 

Ouch !!
Not always, but there are reasons we suggest sticking with OEM parts.