hi everybody any help would be much appreciated. my traxxas revo wont stay running but it starts very easily, it will run for about 10 to 20 seconds maybe a lil longer sometimes then will shut off. or as soon as i start to try and drive for ward it will shut off. im pretty sure all the pipes and gas tank lid are fine. ive fixed this truck alot of times for different reasons but this one has me stumped. it has started doing this after the spur gear screws came out and the spur gear fell of, so i decided to take the engine off and give the car an overall clean. but when i put it back together this is what happened. ive tried to put the needle back to factory settings but before that i had it tuned pretty well.