Just started- going down road fine, but when coming to a stop won't hold idle. Have to float gas in neutral to keep from stalling. not sure where to start. live where there are no lr mechanics. just replaced the starter. check engine light is on was told it is the o1 and o2 censors. was also told it would not effect anything but my mpg. need help. only mode of transport husband out of state not sure what to do. I am willing to get under vehicle and fix myself if given direction. not sure where to start. plase help with direction to go thanks