Pontiac: bonniville, ac delco, professional technician

Question
I have a 1994 bonniville sse 3.8 liter 173,000 miles I changed the alternator and running better but not that good could it be the connetor to the alternator or i have never changed the spark plugs or wires sinch i bot it can you give me some things to do for my car to make it run good thanks   for everything         doug

Answer
New plugs and wires are a good start.I recommend using AC Delco plugs. Replacing the fuel filter will probably help too. The injectors probably should be cleaned by a professional technician. Not sure what else I can tell you since I dont know what its doing.