runnig probs

[kylepiggy]

just fitted dump valve 3" exhaust Screamer dump pipe all runs ok in 1st and 2nd but when in full throttle in 3rd 4th or 5th when turbo wants to come in at 3000rpm the car just pisses about missing and spluttering. i did fit an induction kit aswell cant think what it is. i am goin to fit bcpr7es see if that helps but does feel like a fueling problem. dr silvia hooked up the safc2 for me and that is telling me that my AFM is reacing 100% but in the lower gears it reaches full capacity and still runs fine. any bosy had this problem