ok i have an 88 trooper and its like missing my dad said its running to rich, so i thought maybe the injectors were plugged so i got some fuel injecter cleaner and didn't work. but its weird if i give it full throttle it runs good but if i give it a little gas it feel like its missing, i dont know i think it has something to do with the fuel system, and ideas?

try cleaning your throttle body
the fuel injection cleaning dosen't clean the throttle body you might want to give that a try

i changed the distributor cap when mine did that. the cap was burnt on the inside and wasn't allowing enough juice to the plug wires.

Pull your plugs and Inpect them for carbon deposits.