Dear if possible - pls take the car to a professional as i tried to drag my car's performance for almost 2 years (which i did very honestly and costly) but eventually its the mechanic who treats your car well. I would refer HONDA City Sales, Kalma Chowk, Lhr, Universal Motors, besides Tamaseel Theatre, Mozang, Lahore, and / or Yasir Mechanic, Gulshan-e-Ravi on link of Band Road.
BEsides Pakwheels its also free to have expert's opinion live from a professional.