What Causes the Mazda6 to Shake at Idle?
1 Answers
Mazda6 idle shaking causes are as follows: 1. Severe engine carbon buildup: The most common cause of car shaking is a dirty throttle body or excessive carbon deposits on the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold-start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts, making it difficult to start. After starting, the gasoline adsorbed on the carbon deposits is drawn into the cylinders by the engine's vacuum suction force and burned, making the mixture too rich. The engine's combustible mixture alternates between lean and rich, causing idle shaking after a cold start. 2. Ignition system issues: Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or faulty spark plug firing can also lead to such symptoms. The solution is to check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. Unstable fuel pressure: If you have already cleaned the engine carbon deposits, throttle body, replaced the oil gasket and spark plugs, but still notice shaking at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor for normal operation. 4. Aging engine components: Car shaking can also be related to worn engine mounts. Engine mounts are part of the engine's vibration damping system, responsible for absorbing minor vibrations during engine operation. If the engine mounts are faulty, these vibrations will be transmitted to the steering wheel and the cabin, causing shaking at idle.
