What Causes Engine Shaking After Cleaning the Throttle Body?
2 Answers
The reasons for engine shaking after cleaning the throttle body are as follows: 1. The vehicle's computer system has not undergone 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. 2. Forcing open the throttle body during cleaning may damage the asynchronous motor, leading to engine shaking. Additional Information: 1. A dirty throttle body can cause the throttle to move less smoothly, allowing air entering the engine to carry many impurities, affecting normal gasoline combustion, reducing the engine's working power, and in severe cases, leading to unstable idling, difficulty starting, and decreased power. 2. The throttle body should generally be cleaned every 20,000 to 40,000 kilometers. If the driving environment is harsh, the cleaning interval should be shortened.
I've encountered this issue many times. The main reason for shaking after cleaning the throttle body is that the engine ECU needs to readjust to the new environment. Before cleaning, there was carbon buildup, and the ECU memorized that opening degree. After cleaning, the position changes, but the computer still uses the old idle parameters, resulting in inaccurate air volume calculation and uneven fuel injection, causing the engine to shake. Another common issue is not tightening the screws properly during installation or misaligned sealing gaskets, causing vacuum leaks and allowing extra air into the combustion chamber. Loose sensors like the mass airflow sensor can also lead to signal errors. After cleaning, it's best to reset the ECU or drive on the highway for a while to let the computer adapt. If the shaking persists for days, check if the installation is secure, and if necessary, visit a professional shop for diagnosis. Don't ignore these minor issues.
