Ok, I'll try that Kraivuth,
Thanks Kelly, I got your email about 10 minutes after I posted here on RCU. The first time this happened (the maiden flight of the Reaction) I figured it was because I had run out of fuel, or at least the UAT was only about half full so I figured I picked up air and that put the turbine out but the pump was still running and when it had a chance to pick up more fuel it put it into a hot engine causing the flame.
When the engine does this, just before the flame shoots out, it makes a gurgling noise, shuts down, and then the flame shoots out and sounds like a blow torch, not like a turbine really anymore. Kelly, if you may remember, the fellow out at Princeton last year with the blue and yellow Reaction had the same problem a couple of times.
As for clean, I suppose there could be something in there, though I did check all filters and all are spotless, the engine, although my shop is dirty (body shop) is wrapped up between flying sessions on the airplane. The very first full run I had with this engine was the maiden flight and although I suspect the flame out was due to running out of fuel, it may have been whatever is causing it right now, I simply don't know. Thinking back though, I've run it 3 times outside of my shop and it's run 100% fine. Maybe while I was taxiing out to fly last time the engine ingested something? It's a grass strip that I was flying off of so I suppose that's a possibility.

Anyway, when I get a chance I'll try changing those ramp values and run it again, see what happens.

Thanks guys.
Jeremy