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What are the reasons for engine shaking after cleaning the throttle body?

2 Answers

LeKylie

07/24/25 12:52pm

The reasons for engine shaking after cleaning the throttle body are: 1. Perform idle speed reset learning; 2. The method used to clean the throttle body was to forcibly pry it open, causing damage to the stepper motor. The steps for cleaning the throttle body are: 1. Open the engine hood and locate the throttle body of the engine; 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 port 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, which mixes with gasoline in the intake pipe to form a combustible mixture, thereby burning to generate power.

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FrankDella

08/11/25 6:57am

I've experienced engine shaking after cleaning the throttle body several times. Every time after cleaning, the car would shake for a while. The reason is simple: cleaning changes the throttle opening, and the ECU hasn't caught up yet, still using old data to control the air intake, resulting in unstable air-fuel mixture. It could also be that the cleaning agent wasn't wiped off completely, something got stuck in the valve, or the adaptation process wasn't completed properly. My suggestion is to start the engine and let it idle for a few minutes after cleaning, then drive for several dozen kilometers to let the ECU gradually learn the new parameters. If it still shakes, check if the installation is secure and if the sensors are loose. Regular cleaning prevents carbon buildup, but don't overdo it—once every 20,000 to 30,000 kilometers is enough. Safe driving is the most important thing.

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