I'm definitely not experienced, but I had the same problem with mine for a while. First verify that your glow starter is working properly by taking out your glow plug and pushing it on the starter. It should glow bright orange. If that is ok then inspect your glow plug. Make sure that the wire isn't pushed up in it. If everything is ok there then make sure you nitro isn't old. After you checked these things then I would go onto tuning.