full boost miss?

[mstgfstr]

I was wondering if any one of you dsm gods can help me? I have a 99gst with a 16g turbo from road race, a greddy front mount a apexi safc, a greddy bov,lsd, a walbro fuel pump, denso 660 injectors, thermal exhaust, intake so forth. I had the car tuned to 18psi at dyno tech. And recently my car threw a miss code then I bought new wires new plugs. Then it threw it again then I bought new wires again after one of my buddies pulled out a plug and it arked all over the valve cover. So now i got a new code and autozone said it read that there is too much fuel in cylinder one code, and the car definatly studders really hard when I hit about 16 psi and it does this every time. Its goes blah and there is a huge loss of power then a sec or 2 goes by it does it agian and it will keep going more and more as the pressure raises. PLEASE HELP me so confused

 

[uh-oh]

check for a bad ground(easy)...then look for a bad vacumm hose...especially the PCV valve hose...my car missed HARD because of a rip in the hose...fixed the hose and it went right away...it happened to me right after i changed plugs too GO FIGURE