ching, can you give us two photos at air intake so that we can help you:
1. when the servo is at neutral position; and
2. when the servo is at full throttle postion
there are so many possibilities that the engine shuts down la...
hey, ching. it is not a matter of idling period. over ten years ago i bought a 2nd hand nitro car with 1/3 tank of fuel in it. because i am lazy, i let it idling for further few years. then i tried to start it up and found successful with that 1/3 tank fuel!!!