Replace fuel lines from tank

SOURCE: hesitation, stalling like out of gas

Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.

SOURCE: how to replace a jeep tj fuel tank?

I would be really careful with doing this repair as this is very dangerous. You need to relieve the fuel pressure by pulling the fuel pump fuse and starting the truck. Drain the tank with a siphon pump. Remove any exhaust or other parts that are in the way, loosen the straps and support the tank with a floor jack and a block of wood. There are several hoses, and a few wire connectors to disconnect and you may want to replace those hoses while you're down there. Once you put the new tank in, reconnect the electrical and hoses, raise the tank and strap it back up. Put anything else back together you took off the truck.
Personally, I would take this in to get fixed as this is dangerous work (I did mention that). I you do this anyway, use your head and buy a proper container to hold the gas in , as well as jackstands and a class "B" fire extinguisher. Disconnect the battery and don't smoke or use a drop light under the car, and I will not accept responsibility for this.

SOURCE: 1984 CJ7

You can replace this hose alone but check all rubber fuel lines for cracks.

SOURCE: Disconnect fuel lines from fuel tank

There are two types of connectors on these lines. Either brightly colored quick-connects which do not require tools, (Just squeeze the tabs together). Or black quick connects which must be pushed back to remove line.

SOURCE: crack in 1996 cherokee fuel line from gas tank.

find out what size the fuel line is then purchase two union fittings for that size, aquire a tubing flare tool in order to flare the ends of the 1 ft. length of tubing you will need to buy for the repair,cut out the damaged length with a tubing cutter making sure you have a clean oil drain pan handy because the gas may continue to flow from tank after the breach of the line,make sure there is an almost empty tank before attempting this job if possible, then take the nut and slide it over the cars cut fuel line that is to be repaired then choose the appropriate hole size on the flaring tool clamp it over the fuel line with about an 1/8 of an inch sticking out, then apply the flare making certain the nut is slid over the fuel line before flaring and it is facing the correct direction, after flaring remove the flaring tool and repeat as neccessary on the replacement section of tubing and on the other side of the fuel line to be repaired tighten up unions with two line wrenches at the same time and check for leaks.