91 JEEP YJ RUNS ROUGH
 

I have a 91 yj jeep 2.5 engine.The jeep cranks up fine and idles
fine .When changing gears and rpm up no promblem but once it levels
out it start to sputter at a steady driving speed.If i give it some
gas the sputtering stops but once it gets at steady rpm it starts
sputtering again. It does this in all the gears.Any HELP on what to
look for Thanks Brian.