I'm having a problew with my girfriends 90 Mustang 2.3 it keeps sputtering going down the road. It only does it when I am cruizing. When I give it more gas is clears up. If I hold it in park at 3k is sputters, but when i give it more gas it clears up again. The codes I'm getting are 24 which my book says sis a Air Charge Temperature low nad 41 which my books says is a lean fuel mixture. What should i narrow it down to as to what is causing this problem? Would the o2 sensor do this?