I have 1992 F250 with the 7.3 in it. Since I’ve had the truck I’ve had issues when using my rear fuel tank, in the beginning it would surge while using the rear tank, I’d be cruising easy and it would launch. Now, if I’m on the rear tank, I have to stay on it for it to run, it doesn’t want to stay running unless I hold it around 1000 RPM. I’ve not done a whole lot of digging yet, do these trucks have lift pumps in the tanks like gas trucks do, or do they only have the mechanical pump on the engine? Thanks in advance for any help it’s greatly appreciated!!