What Causes Vehicle Body Shaking While Driving?
2 Answers
Vehicle body shaking while driving can be caused by: 1. Low ignition energy. During startup, especially when the temperature of fuel and lubricating oil is low, more throttle is needed to meet power demands. Over time, the electrode gap of the spark plugs gradually increases, leading to a decrease in ignition energy and poor fuel atomization, which results in body shaking; 2. Aging ignition coils, high-voltage wires of spark plugs, or electrical leakage can also reduce ignition energy; 3. Abnormal engine coolant temperature, low cylinder pressure, or clogged fuel injectors. If the vehicle shakes upon startup, it is recommended that the owner promptly take it to a 4S shop for inspection and repair.
I know this issue all too well, the most annoying thing while driving is when the car body suddenly shakes like a sieve. If it shakes at low speeds of 20-30 mph, it's mostly a tire problem: either the wheel hub is deformed or the tire has a bulge. If it shakes particularly badly at 50-60 mph, it's likely that the tire balancing weights have fallen off, a consequence of not doing a balance after patching the tire. If it shakes severely at highway speeds over 80 mph, check the drive shaft first, especially for rear-wheel-drive cars where worn universal joints are a common issue. Is the steering wheel shaking violently when braking? Don’t hesitate, just replace the brake discs. Another easily overlooked issue—engine mount rubber aging. Last time my car shook so much at idle that my phone was dancing on the dashboard, it was because this thing had cracked.
