Set the cams @ 0 . +4 on both cams isn't doing anything but hurting the motor . If anything you should be retarding the exhuast cam not advancing it ..

Step 1 get some real injectors , no 330 shit , Precision 880cc are 255 shipped on EBay from Fl I got mine in 2 days and onyl paid 265 shipped for 1000cc ..

Step 2 . Get a real tune . The term you get what you pay for comes into play here big time . There's a reason that tune was only 75 $'s , Because it sucks ass ..

Step 3 . Fix those damn cam gears

This should solve your issues seeing that the motor was built correctly and you have no other prevelant issues