Reasons for Engine Shaking When Accelerating on Highways
2 Answers
Highway acceleration engine shaking causes: 1. ECO mode is more like an intelligent fuel-saving co-pilot, guiding and reminding the driver to operate the vehicle appropriately. 2. This phenomenon is called acceleration shudder, usually caused by poor engine combustion. 3. It may be due to low fuel pressure, resulting in insufficient fuel supply from the tank, leading to reduced engine power. 4. Another possible cause is insufficient cylinder pressure, with a common issue being engine misfire shaking, which also results in inadequate vehicle power. 5. The primary reason is engine malfunction.
When the engine shakes during high-speed acceleration, I think this is a fairly common issue, and the root cause may lie in an imbalance in engine operation. One of the reasons could be a problem with the ignition system, such as worn-out spark plugs or faulty ignition coils, leading to delayed or failed spark ignition in a cylinder, which exacerbates engine vibration at high speeds. Uneven fuel supply is another major concern—for example, clogged fuel injectors or a dirty fuel filter can disrupt precise fuel injection, causing uneven air-fuel mixture and resulting in shaking. Additionally, issues in the intake system, like a dirty air filter or carbon buildup in the throttle body, can restrict airflow and reduce power output. Moreover, long-term carbon deposits inside the engine can interfere with combustion efficiency, especially noticeable during heavy acceleration. When checking myself, I start with the basics, such as inspecting the spark plugs, as regular maintenance and replacement can prevent such faults.
