RE: Flameout problem
Are you seeing any smoke when it flames out.
A very large white cloud could point to a internal fuel system problem, fuel pooling up and under the right conditions gets into the combuster, I have had that one.
A bit of smoke could be an air bubble getting in some how, most of us have seen that one.
No smoke at all normally points to the fuel stopping all together, a bad solenoid or a piece of trash that moves into the right spot under the right conditions.
Steven.