I just did a fuel system service to my Ford truck. Although not a Mopar, it had some OLD sections of rubber supply hose and the one that connected the fuel sender to the main supply line was VERY soft. I was having an issue where the truck would stumble and fall off and almost completely die when going up an incline when I had my foot in it pretty good. Back off the gas some and it recovered. SO I went through and replaced ALL the small sections of rubber hose with good Gates EFI Barricade hose. Man that stuff is STIFF. That completely eliminated my issue. The soft rubber hose was being sucked shut. Just one more thing to check. Simple and CHEAP to fix, too. Worth doing even if that's not the issue.