Where is the damage when the car jerks?
2 Answers
The noticeable jerking sensation in the car may be caused by three reasons: excessive carbon buildup in the throttle body, fuel injectors, and intake tract; substandard fuel quality leading to incomplete combustion; or faults in spark plugs, ignition coils, etc., causing cylinder misfires. In such cases, it is necessary to have the car inspected and repaired at a service center to avoid further safety hazards. Normal phenomenon: It is normal for an automatic transmission car to jerk when starting. If you want to accelerate sharply while driving, you need to press the accelerator pedal deeply. At this time, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it will upshift. After upshifting, because the speed will drop significantly, a relatively noticeable jerking sensation will occur. Transmission damage: If the jerking sensation is more severe than normal, the owner should consider whether the transmission is damaged. For example, stubborn dirt and impurities inside the transmission, especially when they accumulate in the valve body and form blockages, can prevent effective regulation of oil pressure, leading to jerking, impact, and slippage issues.
The jerking sensation in small cars is often a headache. It could be an issue with the engine's ignition system, such as aging spark plugs or faulty ignition coils, leading to incomplete combustion in the cylinders and causing the car to jerk during acceleration. Another possibility is a clogged fuel system, like excessive carbon buildup in the fuel injectors or a need to replace the fuel filter, resulting in insufficient fuel supply and causing jerking. Don’t forget to check the air intake system—a dirty air filter can reduce oxygen input, affecting the air-fuel mixture ratio and leading to unstable power output. Transmission issues should also not be overlooked. For manual transmissions, severe clutch wear can cause jerking during gear shifts; for automatic transmissions, degraded transmission fluid or a faulty control module may lead to rough shifting. Problems with engine-related sensors, such as the throttle position sensor or mass airflow sensor, can also affect responsiveness. It’s recommended to first inspect the spark plugs and fuel system yourself. If the issue is severe, visit a professional repair shop promptly to avoid safety hazards, as minor problems could escalate into major failures.
