Volkswagen Santana throttle doesn't work.

Mainly check whether the air inlet is leaking, and spray it with carburetor cleaner where it may leak. If the engine speed increases, there is air leakage. This phenomenon has happened many times in my car, 1, the exhaust pipe is broken, 2, the oil dipstick sleeve is broken or the sealing ring on the oil dipstick is missing, 3, the oil nozzle sealing ring shrinks and leaks oil, 4, the exhaust valve is damaged, and sometimes it screams, 5, the sealing ring of the fuel filler cap is damaged. 6. The air inlet is damaged and leaked.