A friend/neighbor of mine has a YJ with the 2.5L engine and he is having a hard time getting it to run smooth. He has replaced plugs, wires, distributor/cap, etc and it still doesn't play nice. He swapped out the fuel filter and put a new one in. It ran nice for about 3 days he said then went back to the back idling/rough running.
I'm thinking he has junk in the tank and may possibly need to drop and clean or replace it and/or the fuel pump. I'm not sure how different the YJ and TJ are in terms of tank and pump, so any pointers, advice, tips would be appreciated.
Once he gets this thing running, he wants to go wheel with our group. If he can't get it working, he'll likely sell it and look for a TJ to build up.