Need Help- Engine Surging
 

Hey I could really use some help here. My car's an Rx8, while not quite an Rx7, I find the people on this forum generally to be more knowledgable with rotary's then those on the 8 forum. I had it turbocharged with a Greddy kit which I just removed this past weekend and put it back to stock. It seemed to drive fine. I was on my way to work, was almost there and decided to hammer on it a bit. I floored it up to 8k rpm's and then the power completely died. Now the engine does not respond at all to throttle inputs and it just rapidly revs between 2-3k rpms. It starts right up but immediatly begins this surging. Any idea's on how to start troubleshooting this?

Thanks!

I pulled the codes and found the following:

P0638: Throttle actuator range/performance (Bank 1)
P2109: TPS/Pedal positionsensor a Min. Stop Per.