What Are the Causes of Automatic Transmission Idle Shaking and Stalling?
2 Answers
There are many reasons that can cause idle shaking and stalling in automatic transmission vehicles, such as air intake system leaks, low fuel pressure, clogged air filters, injector atomization leaks, improper idle adjustment, faulty spark plugs, air flow meter malfunctions, etc. The idle speed of a car refers to an operating condition. When the engine is running without load, it is called idling, meaning the car is in neutral gear. The engine speed during idling is referred to as the idle speed. The idle speed can be adjusted by modifying the throttle opening size, among other methods. Idling essentially means the engine is 'running without doing work.' The following measures can be taken to address idle shaking in vehicles: 1. Clean the fuel system and check the idle control valve for carbon buildup, cleaning it if necessary. 2. If the spark plugs are excessively carbon-fouled, they can be removed and cleaned, or replaced if needed. 3. For idle shaking caused by unstable fuel pressure, it is necessary to first identify any leaks in the fuel supply system, then test the atomization effect of the fuel injectors, and replace the corresponding components if required.
I always feel my automatic transmission car shakes severely at idle and stalls easily. Common causes are fuel system malfunctions. A clogged fuel filter restricts fuel flow, preventing the engine from getting sufficient fuel, leading to unstable combustion and shaking, which may result in stalling when severe. Carbon buildup in fuel injectors causing inaccurate fuel spraying is another issue - the lean air-fuel mixture at idle makes it more prone to problems. I've noticed it's more obvious in winter low temperatures, where poor cold starts with leaner mixtures trigger shaking and stalling. Solutions? Regularly replacing filters is crucial, and cleaning fuel injectors helps too. Don't cheap out on gas - using cleaner fuel reduces system strain. Prevention beats repair, imagine how dangerous sudden stalling on highways could be.
