@every one who replied
i just got it check with some mechanics and the problem seems to be in the main becon (sumthing like this he said) and he also said i might be possible becuase of the becon which i gathering all the smoke but still he said that pistons needed to be check because if they're finished then he has to replace it this all is costing me 15k.
and i cannot afford a new engine the rates have gone high i went recently to sher shah because of this problem they were asking 45k in exchange way too far then my budget.
mechaninc gave me the guarantee there wont be any other masla with the car then even if i put intake and headers in it...currently i have installed only a muffler.
opinions??