I have a 1995 Galant ES AUTO.I just changed the water pump and timing belt.Now it sounds fine at idle,and idles fine.When you put in drive it still sounds fine then you hit the gas and it sounds like ****(real loud). It had a small exhaust leak before ,but nothing this loud. Also it doesn`t want to go,its real slugish.There is also a little bit of smoke.Im losing my mind here,any help would be greatly appreciated.Thanks guys