Thanks. I bypassed the fuel heater because the temps dont get too low here in Maryland. I was just worried about bypassing a factory system. I though maybe Dodge knew something I didn't about the fuel. It was a fairly easy install for the fuel lines. Truck started right up.

I have the same issue with my fuel guage except it shows empty. When I pulled the sending unit out of the tank it got caught on the edge so I'm sure I messed it up. I read the 12Vdc goe to the sending unit through the resistor track and out puts a dc voltage between .6(FULL) and 7 volts (EMPTY). If your guage only reads to half it safe to assume your wiring is fine.

Try cleaning the connector plug on the tank (this send the 12vdc input and sends the corrosponding output voltage to the ECM) and making sure its completely seated. If you still have a problem I think you are going to have to drop the tank and look at the contacts on the resistor bank. I just dropped my tank last night and the contact on the float arm was not touching the resistor bank so I think I found my problem. I'll post some pictures of my issue so you can see how I messed this up.

 

Well.....the issue was the float was getting caught on the new draw tube I installed for the air dog. I installed the tube on the passanger side of the tank but when I reinstalled the tank the return line and original fuel line wouls not reach the sending unit so I remember that I loosened the cap on the assembly and rotated it untill the lines would connect. When I rotated the unit the float got caught on the new draw tube. If I had to do this again I would have spent more time planning the install location of the draw tube. I did read the input voltage and moved the float up and down and the guage did move with the float but it does have a 20-30 second delay moving the needle so that threw me off for a while. I'm going to reinstal the tank tonight and I'll only post again if I have or find another problem.

I don't belive you have a connection or wiring problem because your getting a reading. Try rotation the sending unit untill the float is clear. You may was to pull your drive shaft to give you more room. I pulled mine to replace the transfer case output seal and it makes a big difference. I will now be able to actually reach the connections on the tank.

Good luck with your fuel problem and I hope this post helps.