93 ford aerostar poor pickup

this van is in good running condition,trans is good, but the pickup is very slow,it seems that it could be better ,anyone have suggestions?it currently gets about 18-19 miles per gallon as a reference

How long has it been since your last tune up? Clean air filter? When was the last time the throttle body was cleaned out? Original fuel filter? All of these can help with your gittyupness. Or if all else fails put in a cold air or a turbo?!