definitely true, if you're under there checking evap system, makes sense to check out the wiring for the fuel system as well. Not sure how easy that is to do, but as long as it's reasonably accessible shouldn't be too bad.

 

My ram did the Same thing for 4 years, could be driving down the road and the gas gauge just go to empty, sometimes it would recover, sometimes it would just stay there, sometimes it would just stay empty no matter what.


It did that until 3 days ago. When I installed a new pump and sending unit in my truck. Had to because after 195,550 miles my fuel pump crapped out on me in 100 degree heat with my 63 ford fairlane on the trailer behind it.


The evap cannister is located right in front of the gas tank, and there is a plastic line from the tank going to it with a quick disconnect fitting. If the tank has been down before you might check and see if that line has been kinked or broke. On the hemi trucks I believe there are a couple more lines on it than my truck has so check them all.

 

Its the sending unit, I went to a shop and pulled the codes, and it actually showed up in my codes, apparently the "key trick " doesn't tell the whole story lol