okay, so i figured out my no spark, figured out my vacuum leaks, and now a new problem. if i give the car half throttle, i can run up to redline no problems, and boost will go to around 5lbs. now at full throttle no matter what gear the boost jumps to anywhere between 9 and 12 lbs the car goes no where and it starts backfiring like crazy like its hitting a rev limiter. first thing i thought was boost leak, but i built a tester and couldn't find any leaks. the car is a stock gte swap with 3in turbo back exhaust and k&n pop charger. i've replaced all vacuum lines, plugs wires, plugs and timing belt. i'm at a loss. i also just cleaned and checked the cps.