i just installed my vortech kit with dw600 injectors(new), walbro 255 fuel pump (new), turbo xs utec (new). kit was installed on sunday and tuned on monday by forged performance(sharif). it ran ok on monday, but from tuesday i noticed car was spuddering time to time when i'm driving. today i took the car back to forged. sharif test drove my car and he said my car was running on 5 cylinder intermittently. that's why car car sounds like it's been camed. what i have found is, when the car is on 5 cylinder i would disconnect one of the injector and waited 2-3sec and reconnect will fix the issue, but it will happen again. problem got worst from this morning to now.

anyone had same issue or know what might be causing it? is it the injector, fuel pump, or utec? sharif thinks it's the utec and i think so too. i belive it's not the mechanical issue, cause it won't be intermitten. please help me out and thank you in advance.