when reading your first post you say that you loosen the glow plug to clear a possible flooded motor?
to clear a flooded motor, remove the glow plug and pull the motor over. also, tip the truck side-to-side. sometimes a nitro can become soo flooded that fuel will sit in the muffler. you clear out the top end, but as soon as you pull the motor over fuel rushes from the muffler into it and floods it again.