The other thing I forgot to mention is I'm not running the factory muffler that that came with it. I put on a Pitts style muffler because it fits my plane much better.
I will try everything you suggested with the carb. I had the disc adjustment screw set in the middle. I was starting it with the throttle 1/4 open, that might be too much. It's just strange it runs 3-4 seconds then dies everytime.

I will keep you updated. Thank you.