This is one of the most common Jeep problems. There are two hoses coming off of the valve cover. One goes to the air filter box and the other one goes to the intake manifold. The one that goes to the intake manifold is a vacuum line that breaks or becomes plugged easily. When that happens the air filter fills with oil. Check to see if that line is broken, if it is not then take off the end at the valve cover and take a small pick or nail and stick it into the fitting and clean out the carbon build up.
Clogged fuel filter, or failing fuel pump.
No, it will not.
A 1994 Wrangler is fuel injected, not carbureted.
bad fuel filter
Yes it will.
A car owner should know the location of the diagnostic port in their car. The diagnostic port in a 1994 Wrangler would be in the engine compartment, near the firewall.
First thing you may want to check is for a clogged fuel filter
they might be different on some models but they would be interchangeable either way.
the fuel filter is on the frame rail drivers side ahead of the rear wheel, you will need fuel connector separation tools but its pretty easy