1991 jeep wrangler, 2.5, manual. hesitates, and occasionaly misfi

hi there.
not sure if this link will help you out but have a look.
1991 Jeep Wrangler stall and die Google Search

Get rid this vehicle to some pond and buy a new one.

Spray some starting fluid into the throttle body. If it starts then you have a fuel problem. If it does not, then check to see if you have spark to the plugs.

It could be a fuel filter clogged up or it could be a fuel pump going bad. Does the jeep start back up after it stalls? Is there any more symptoms?

see if your engine has a ECT sensor (temp sensor that delivers information to your ECM) they are installed on the intake side of the cylinder head, it usually has 2 cables, have it checked replace if necesary

I'm not sure if your Jeep has this or not, but you could check with your local Chrysler dealership. Some vehicles have a sock filter in the gas tank to filter any debris before it is delivered to the engine. What sometimes will happen is, you vehicle will start and run until debris clogs the sock filter and it will die. After the vacuum on the fuel line is gone the debris will fall free from the sock filter back to the bottom of the gas tank. Then when you restart the vehicle it picks up the debris again and clogs you filter again. This happen to me once and I have to remove the tank and clean the debris out and install a new sock filter. Good luck.

Check spark and fuel pressure. One is failing and must determine which to proceed further.

Try to exchange the coil i

Check fuel filter . You have a mechanical pump & a carburetor on that model dont you?...Check fuel pressure (should be around 6-7 lbs) and check coil immediately after it shuts down...sometimes coils will act like that just before they go bad..

could be the cap and rotor or the pick up in the distributor