I bought an '88 ramcharger,318 f.i.,4x4,automatic from my 80 year old neighbor with 34,476 actual miles.It was used as a farm vehicle till 2006 when his knees gave out and he parked it. I pulled the tank and cleaned it,new fuel filter,changed the oil,put in a battery and fired it up.It runs extremely rich cold,does better after warmed up.The only codes are 12 because of replacing the battery,37 and 55 end of codes...any ideas on clearing this thing up?thanks