jojoinVV80

hello guys, new member here. i have an issue with my 94, its running kind of rough, as if it is hesitating when im driving it. ive changed the plug, thinking it might be that, but the same thing happens. replaced the pcv valve, nothing. plug wires look good, almost new. ive cleaned the MAF sensor, nothing changed either. any suggestions on what to do next? thanks in advance. oh and did i mention the gas milage sucks