ur-q fuel pump?

[CLeiter@aol.com]

Hi Guys,
I own aan 82 qtc with a IA stage 2, advanced cam, 15lbs of boost.  
Now my problem is that with the air on the car runs out of steam at approx
4000 to 4500k, and in first its real sudden loss. (The computer must be
shutting it down). And with the AC off, it still runs out of steam at
4500-5000 rpms. Now I've replace the o2 sensor, as well as the coil. Could
this be that I am still overloading the coil, should I put an upgraded one
in? or is it the fuel pump? What other fuel pumps can I put in to feed more
gas? I've heard of somebody putting in the 928 one?
Ideas? 
Or is it just that its only a 2.2l and thats all it has?
Thanks,
CHuck