What Causes Car Shaking and Lack of Power During Acceleration?
2 Answers
Car idling shaking and lack of power during acceleration are generally caused by excessive carbon buildup in the throttle body, leading to restricted air intake. As carbon deposits accumulate, fuel passages become blocked, engine performance declines, fuel consumption increases, and a series of complications may follow. In China, gasoline is derived from heavy oil with high sulfur and acid content, containing elevated levels of sulfur, carbon, manganese, and trace metals. High-impurity gasoline, after combustion, adheres to various combustion components, forming carbon deposits on piston surfaces and combustion chamber walls. There are two main methods for carbon deposit removal: 1. Manual cleaning of internal carbon deposits. 2. Using gasoline additives to improve combustion and clean carbon deposits. Comparatively, manual cleaning requires engine disassembly, which is complex and costly, and may also harm the engine. Fuel additives, on the other hand, are simpler, more convenient, and relatively cheaper, providing thorough cleaning.
I've encountered the issue of car shaking and lack of acceleration power many times, usually stemming from the ignition system. When spark plugs are worn or have incorrect gaps, unstable ignition can cause engine misfires, resulting in intermittent body vibrations. Fuel system problems are also common culprits – a weak fuel pump or clogged fuel filter will naturally lead to sluggish acceleration due to insufficient fuel supply. If the air filter in the intake system is too dirty or the mass airflow sensor fails, reduced air intake causes improper air-fuel mixture ratio and power loss. Loose engine mounts or bracket screws can also be contributing factors, as severe shaking may affect overall power output. My recommendation is to first check spark plugs and ignition coils, as these are simple and inexpensive to replace; then measure fuel pressure to verify system integrity. If the oxygen sensor malfunctions, the dashboard warning light will illuminate – timely code reading and troubleshooting can prevent minor issues from escalating. Safe driving should always be the top priority.
