What Causes a Car to Shake During Ignition?
1 Answers
Here are the reasons why a car shakes during ignition: 1. Individual Cylinder Misfire: The main issue lies in the malfunction or failure of the ignition coil, leading to misfire in one or multiple cylinders, which is particularly noticeable during ignition. The solution is to check if the ignition coil plug is loose, remove the ignition coil for carbon deposit cleaning, and then reinstall it in sequence. 2. Excessive Engine Carbon Deposits: When carbon deposits accumulate to a certain extent in the engine, detonation can occur, causing abnormal engine shaking. Since carbon deposits have high-temperature characteristics, they can prematurely ignite the atomized combustible mixture before ignition, leading to adverse effects. The solution is to clean carbon deposits from the throttle body, fuel injectors, and other areas, or add a cleaning-type fuel additive to the gasoline to remove carbon deposits. 3. Blocked Intake or Exhaust System: If the engine's breathing is obstructed, it can cause shaking. The solution is to inspect or replace the air filter and check if the catalytic converter in the exhaust pipe is blocked. 4. Damaged Engine Mount: When the engine mount is damaged, not only does the engine fail to absorb vibrations, but it also experiences severe shaking during ignition, which is also particularly noticeable during rapid acceleration or deceleration. Therefore, it is necessary to slightly lift the engine at a repair shop, loosen the screws, and replace the engine mount with a new one.
