Hello I have a 2003 Grand Am Gt with 82000 Miles on it. It started running rough on my wifes way to work. I took it to auto zone and it said number 2 misfire so i replaced the spark plug and the wire. NOthing changed. so then it said random misfires. I replaced the air filter and fuel filter. I had it checked and said the coil packs are ok and i put a screw driver on the fuel injector and its ticking ok on number 2 4 6 anyone help me figure this out would be great thanks! also car was only gettting 22 miles to gallon mostly on intestate. thanks Dustin