help..ung carnival namin mausok na eh.. mga 50k na natakbo in 2 yrs.. saan kaya may ok na calibration or injector overhaul na within qc an marikina lang.. as in magaling and reputable shopÜ i feel a loss of power din kasi eh.. papalitan kaya ung injectors nun and san kaya makakakuha ng parts? help talga nakakatakot na gamitin eh baka mahuliÜ