What is the reason for severe shaking after cleaning the throttle body?
2 Answers
The reason for severe shaking after cleaning the throttle body is: failure to perform data matching. After cleaning the throttle body, it is necessary to reset the computer or disconnect the negative terminal of the battery to allow the computer to reset the throttle body. The steps for cleaning the throttle body are: 1. Open the hood and locate the engine's throttle body; 2. Use a flat-head screwdriver to remove the air filter and intake pipe, then unplug the electrical socket on the throttle body; 3. After removing the screws, take off the throttle body and use a dry cloth to block the engine intake to prevent dirt from entering the engine; 4. Spray the throttle body with cleaner. The throttle body is a controllable valve that regulates air entering the engine. Its function is to control the air entering the engine, where it mixes with gasoline to form a combustible mixture, which then burns to generate power.
After cleaning the throttle body, I once experienced severe shaking issues. The mechanic later explained that the main cause might be improper throttle body reset. After cleaning, the position sensor signal changed, and the engine ECU couldn't recognize the new state, leading to incorrect throttle opening and air-fuel ratio imbalance. Another possibility was cleaning agent residue affecting sensor readings or improper operation damaging the valve. It took me half a day to figure out, but a quick diagnostic tool recalibration at the shop fixed it. Another common factor is intake leaks or loose hoses causing uneven airflow-induced shaking. Also, check spark plugs and fuel injectors—if dirty, they can worsen the problem. After routine maintenance, always let the car run for a few minutes to allow ECU adaptation, preventing similar issues.
