I have strong mid power first and second but then 3rd and 4th (at highway speeds) the car completely looses its pull. Almost like the turbo shut down. First and second its running 10 PSI but 3rd and up it runs more (about 15) Despite the extra boost the car is slower. The car also seems to pull really hard 3-4 grand but by 5 the power dissapears and the engine feels like its starving for something. There is no boost leak, and I know I have leaky injectors could they be to blame? I have a A/F meter guage and the mixture jumps around ALOT when you first crack the throttle its lean for about 2 seconds then goes to rich about 4 seconds in but the car is still slow top end. Could my leaky injectors be confusing the O2 sensor into giving the wrong mixture? The powerband on my car SUCKS poor high PRM performace and low power in a higher gear despite additional boost. any ideas whats going on? Basically first and second its really quick then I go into 3rd and its all downhill from there =( PLZ HELP!!