NitroJim4576

Does the tank pressure line need to be air tight with the muffler? That's the only leak i know of, but other than that i am going to check the engine for air leaks and see what i find.

Once i get it started it will stay running if i lean the mixture but it will rev very high like basically full throttle.

So i have an Acme Condor buggy and up untill recently it was running fine. Now all of a sudden the car has become very hard to start, about the only way i can get it to start is by putting fuel directly into the cylinder. I have tried a new glow plug and no change. I am using a hot glow plug and 20% nitro mix. Once the car is started it goes full throttle (the carb gap remains at 1mm and throttle servo does not move). The idle screw and main tuning screw make no difference. I am relatively new to nitro cars and i'm completely baffled to what this could be. Also i will note that there is a leak where the pressure pipe from the tank meets the muffler.