Can someone please give me there insights on this situation. I ha e searched all the forums and cant find anyone with this same situation. 2nd srt4 I have owned. My previous car was an 05. Never had a problem with it. Bought 2004 blue srt4 a couple weeks ago. Seems to be stock other than agp wastegate and hks b.o.v.. Bought car from a local mechanic shop and was told it had been sitting for nearly a year when we first started the car it wouldn't rev over 2500 rpms plugged up scan gun and it showed cam sensor was bad changed it and it would then rev to about 4k and start cutting out popping and back firing. No more cam sensor code. Took the car to a guy that specializes in these cars and he plugged his laptop up to it and did some data logging now this is the weird part... Anytime u try to boost over 5 psi or or rev over 3500 to say 4k rpms the lap top shows its losing voltage at the tip map and inlet pressure sensor all at once. We have changed out every sensor on the car still same results. Also the car hesitates when starting. U got to start it over 3 to 5 times to get it to crank. Idols fine. Anyone have any idea what would be causing this? Fuel pressure is also right on point. Changed plugs wires and coil. Running out of things to try. PLEASE SOMEONE HELP!!