My 90 wrangler stalls out when accelerating . It gets to the point that it won't move forward. It will idle and even turn 4500-5000 rpm . It then stalls out. I've replaced ignition control module, distributor cap, rotor, coil, spark plugs, camshaft position sensor, fuel pump, fuel filter, o2 sensor. Don't know what is left to try!, It's a 2.5 fuel injected manual. Maybe catalytic converter? Any suggestions would be great!!!!!
That is about all that is left to be replaced. I mean it sounds like under a load it is losing something fuel ro spark but you may have hit on it maybe the exhaust is plugged. You can just remove the cat and check it out open pipe and see if that is it real quick.
Take you hand and stick over the exhaust outlet. Get someone to rev jeep and see if the air pressure increases back there. A clogged cat will not let a lot of air out... Easier than taking off the exhaust..
I doubt this is it but it reminds me of my '86 Civic. I could drive it at 60-70 mph for about 10-15 minutes and it would just sputter and act like it was out of gas. I replaced all the same things you did. I finally dropped the tank and found out the sock on the pick-up tube was clogged with junk. I pulled it off the tube and it dried and crumbled in the wind.
Since I paid $200 for that car I just put everything back together and it drove like a top.
I'd check the exhaust before I dropped the tank though.
I have a 1990 with a 2.5 as well. This sounds similar to an issue I had last year. I tried all the stuff you did. It turned out to be the intake temp sensor that determines how lean/rich it should run. It is on the intake between the throttle body and the valve cover. It takes a minute to remove it. I think checking resistance is not easy with a regular meter. Mine was broken so easy to see the problem. If your is still intact, try cleaning it first. I ended up having to get one from a wrecker so the sensor only cost me $5. Good luck.