I need you guys' help to give some lights.
Engine: 6A12 NA
I experienced occasional erratic engine behaviour mostly after running hot for sometimes. The engine would run like loss of breath and feel some power loss, it ran not as smooth as it used to be. When I pulled over at the roadside, the idling was very rough swing between 200-1000rpm but not stalled. Disregarding the problem I kept on driving slowly @60-80km/h for 30mins the phenomenon disappeared for no reason. It ran smoothly...