Things that I have changed..... Mass Air Flow sensor. Fuel filter. Fuel Pump. Ignition coils. Spark plugs. Air filter. Sprayed the intake manifold with intake cleaner and also the throttle body. Cleaned all electrical plug ins with ECC. Changed the mufflers to the new borla mufflers. Cats are gutted. Checked the PVC in the center of the motor near the back, no problems with it. As far as I felt and seen anyways. Has newly put on injectors roughly 3 months old. Newly fuel rail 3 months old. New top end gaskets.
The only things I can think of I havent changed that I need to is fuel regulator. Cat backs (glass packs) whatever u call em. EGR. Idle control sensor. Just alot of odd and ends