How much boost you runnin?? what plugs do you have in your car.. Fuel pump?? is timing on.. not retarded or advanced?? grade fuel runnin?? fpr?? what kinda air/fuel gauge you got??? I got a stock y8 runnin 9 psi stock injectors, fmu, and 255 fuel pump.. no piggy back or any kind of fuel control.. Let me know what ya got on your car. maybe i can help ya out!