Ok...I have a 97 gst...mods include intake, exhaust, hks cams, big 16g turbo swap, 550cc fuel injectors, upgraded fuel pump(not sure what size was done to car before i got it), greddy type rs bov, front mount intercooler, and a boost contoller(Manual), and i wired it to a switch in my car so i can cruise around on 10 psi and run 20 when i want to race... i have toalked to people and they say 20 psi is fine without doing any huge engine work... but when i try to run 20 psi it will pull hard for about 3 secs then it will lose all power...i cant figure out what it is... it is a rediculously violent jerk and i have talked to friend and he said maybe just old gaskets or something so i got alll new gaskets and put them all on but that wasnt it so im back to where i started...can sum1 help?

 

What are you using to tune?

 

Your hitting fuel cut because you probably arnt tuning for that extra air. That is your problem. You cant just up the boost and expect the car to run fine. You have to adjust for that extra flow