My old Prima lacks power, and sometimes it feels stuffy and the throttle is heavy. Is it good to clean the nozzle and throttle? Is it related to the gasoline filter?

Hello, dear! Insufficient power and engine muffled sound should be the factors that lead to the rich mixture. The landlord can smell the exhaust when the car is idling. If the black smoke smells bad, it means that the air inlet is blocked somewhere. The three elements of a car are oil, gas and electricity. If the gasoline used meets the requirements, then the intake pipe is blocked. If not, the spark plug is black and the ignition is not allowed. Finally, there is the problem of sealing somewhere in the engine. I hope my answer can help you, please set it as the best answer! thank you