Let me start at the beginning the reading was erratic then went to nothing then would work then not. Dropped tank checked sending unit but check out ok with meter. But when I inspected the float it had wore out the hole and had a groove were the arm went in the float. So went ahead and replace the sending unit after putting it back together before putting fuel in check and it read E put in 5gal. gauge read 7/8 full. Now what? Sorry didn't say this is on sons 2001 2500 and had just put Fass pump and filter on about month earlier work ok until about week ago.

 

Did you use a draw tube? Dose it interfere with the movement of the float arm?

Dave

 

Didn't use tube and double checked the arrow on housing with marks on tank. Thanks for the your reply and any others are welcomed that is what makes a site like this work because we need to help each other in life and with life's problems.

 

Bad thought séance both wires have same end could it be that after I took great panes in tracing wires that it would back wards.

 

I was thinking the same thing, wires reversed.
1/8 is reading 7/8
Figured you just unplugged the connector and plugged it back into the new module. If you cut wires there could be the problem.

 

When I plugged it up empty it didn't move off E maybe didn't waite long enough. Also did a gauge check by holding trip button in with switch in start position.