I've tuned an engine per break in instuctions and it has actually been in the air four times. But after a tree jumped out in front of my plane, (a trainer) it wants to quit when I lift the nose of the plane more than 45 degrees.

I don't see anything loose or bent etc. The hose in the fuel tank seems intack however I can't get to it.

The engine is a 0S LA 40. It really ran great before that damn tree. Does anyone have any ideas?

Oh yeah, there is also a vibration that wasn't there before the wreck.