Wa Alikum Salam,
Bhai check its Spark Plugs, may be they require Cleaning or Replacement.
Make sure to Clean your Air Filter every week. Dust ki waja saay aksar Filter Choke ho jata hai aur milage pay affect aata hai.
Apnay tires ka air pressue check kerwao aur correct pressure maintain karo.
FAW ki free service Campaign bhi chal rahi hai, apni gari yahan check kerwao. Hopefully koi solution milay ga.