I have a new thunder tiger pro 46 that I put in an alpha 40. After running about 4 tanks through it, and breaking it in, it ran great. I then swapped the engine over to a hanger 9 f-22 raptor after having a mid air collision with the alpha. Now it runs good and will stay running except when the plane is tilted up. In about 5 seconds the engine will speed up on its own and die. It does this every time the plane is tilted up. I can tip the plane back on its tail while it is on the ground and it will do the same thing every time. I am wanting to do a madien flight on this plane this evening but dont want to risk it until i figure this out. I have no clue at all. Anyone have any ideas?