salam mara pas honda city 2002 hai automatic hai aur petrol par hai car ko jab main P par ya N pa race data hoon to nocking sound aati hai aur jab D4 par gari ko fast accelerate karta hoon to phir bhi nocking karti hai aur 3rd gear par bhi nocking karti hai kindly pakwheelers tell me whats the problum with my car thanks in advance and kindly reply experts