Why does the car suddenly start shaking?
2 Answers
Sudden shaking of the car may be caused by issues in the fuel system, electrical system, or mechanical components. Fuel system problems: Fuel system issues are generally caused by clogged fuel lines, leading to poor fuel supply, manifested as engine shaking, unstable idling, or stalling while driving. Additionally, fuel pump failure can also cause engine shaking. To diagnose fuel pump issues, disconnect the fuel line and check the flow rate and volume of fuel. Electrical system problems: Check if the ignition timing is accurate, as abnormal ignition is usually a timing issue. Inspect whether the spark plugs have aged, if the gaps are uniform, and if there are any changes in the gaps. Also, malfunctioning of the distributor can cause engine shaking. Mechanical reasons: Check the engine's operating condition for any abnormal sounds, such as valve noises. Inspect the belt's working condition to see if it is loose.
My car had this issue before, shaking violently when accelerating, which scared me into pulling over immediately. After inspection, it turned out to be aged spark plugs causing unstable ignition and abnormal engine operation. It could also be tire-related, like uneven tire pressure or unbalanced tire wear, especially noticeable at high speeds. I suggest checking the basics first, like verifying if the tire pressure is within the standard range or listening for unusual engine noises. If that doesn't help, consider fuel system issues such as clogged injectors, insufficient fuel pump pressure, or excessive carbon buildup affecting combustion. Get it diagnosed at a professional repair shop as soon as possible—safety first, don't delay to avoid bigger losses.
