i am currently experiencing an idle issue while either at a traffic light waiting for it to turn green or at a extended stop at a stop sign. the truck runs and starts just fine. idles fine in park. drop it into gear and head on down the road and it just fine until you have a traffic signal or stop sign you can hear the motor after 30 seconds or maybe longer starting to die down to almost no idle and wanting to die right there, but then it will catch itself and start to die again. now if you put the gear in neutral while waiting the idle is just fine. the truck has over 176k on it and i have not really done anything to it in the 3 years that i have owned it. any help in trying to solve this issue will be much welcomed and thanks.