Hi expert, i have an indigo cs TDi engine, clocked 2.25 lackms. Engine sounds better, i but feel the pick up is low and but the cabin noise is more. if i press the throttle little harder it speeds it reaches 120 Kms in the Highway easily? Does the engine needs overhaul? If it is overhauled, how many kms can it run and how about the milege, pickup? Kindly suggest me.