I recently bought a 2002 mustang gt 4.6 with v2 vortech procharger. Runs strong engine wise except a light spudder when barely touching the gas in 5th. Changed coil packs with accell and ngk iradium plug gapped to spec. Also cleaned out throttlebody. Still light spudder. On a pull nothing and at a idle nothing only when gently giving it the throttle cruising. Also noticed when I changed plugs all the ones on driver side was burning oil passenger side was clean. Advice would be appreciated I am new to the preformance side have been a mechanic all my life and bought this car for fun and wanted to pick some more experienced brains out there. So with that being said any and all advise would be appreciated.