OK I just replaced my turbo, it is a used turbo but was in very good working order. I put a BIC DP on but it is not a DDP, the car currently has no exhaust on it and is running the stock IC and piping. I did replace the spark plugs on it before I replaced the turbo and such but everywhere I went to get spark plugs they did not have the dual platniums in stock so I went for a cheaper ngk that cost around $2 a plug. Now on to the problems the car is idling fine but when I gas into it some times it will blow flames but when Im driving it sputters when it hits boost and it is only boosting at 5psi. I do get a real strong smell from the exhaust but I just figured its cause its open DP. The vac is reading around 20 so my vac is fine I just want to know what the hell is causing my car to sputter like it is. It drives fine, nice and smooth up until I hit boost. Im going to try replacing the spark plugs with the OEM ones and see if that clears any thing up but If any one has an idea of what could be wrong please let me know.