2004 1500 Nomad fi losing power or dying

[ibcruiser]

Hey Team, I have an interesting issue on my 04 Nomad...Recently I've been experiencing a "sputter" when I down shirt and throttle up on an incline (Hill). Today it went from a “sputter” to blinking “Fi” lights and engine dying when I throttled up. I barely limped home... :-[ If I wound-her-up around 3K it wound stay running. When I throttled down or down shifted and gave it the gas I would get an “Fi” warning light at low rang of the throttle. My first foray into the Fuel Area of my Nomad… I thought maybe a fuel filter til I discovered there in not one. (Part of Fuel Pump?) Maybe a fuel pump. At 500 bucks for a new pump I want to be sure. Anybody out there on the team have similar issue? What fixed it? Thanks ahead of time for any thoughts… IBCRUISER :)