What Causes the Body Shaking at Low Speed in Regal?
2 Answers
Regal low-speed body shaking may be caused by the following reasons: Fuel Quality Issues: According to statistics, a large proportion of idle speed shaking problems encountered by car owners are caused by fuel quality issues. If poor-quality fuel is occasionally used, it not only damages the engine's performance to some extent but also leads to the continuous occurrence of minor issues such as body shaking, thereby increasing later maintenance costs. Therefore, it is also reminded to all car owners to pay attention to the fuel quality when refueling and to refuel at regular gas stations. Severe Carbon Buildup in the Car Engine: The most common cause of body shaking during car idling is that the throttle is too dirty or the gasoline sprayed by the fuel injector is absorbed by carbon deposits, resulting in an overly lean air-fuel mixture in the combustion chamber, making it difficult to start the engine. Solution: Clean the fuel system and check whether the idle speed motor has carbon deposits that should be cleaned. Shaking Caused by the Ignition System: Ignition system shaking is generally caused by the ignition coil and spark plugs. The main checks are whether the ignition coil has signal loss, poor contact, or module failure. For spark plugs, the main concerns are whether there is carbon buildup, insulator cracking, gap too small or too large, or high coil resistance or leakage.
Low-speed body shaking is quite common in the Buick Regal, and I think it may stem from tire issues. Tire imbalance or uneven wear can cause increased vibration at specific speeds, so checking for consistent tire pressure and whether the wheels are out of round is crucial. Aging suspension components could also be the culprit—for example, leaking shock absorbers or worn ball joints may induce shaking, especially noticeable during low-speed turns. Engine ignition system failures, such as excessive spark plug gaps or faulty ignition coils, can disrupt smooth operation. I recommend starting with a tire inspection and performing a balance test if necessary; if that doesn’t help, have a professional check the suspension and ignition components. Preventive maintenance like regular tuning can significantly reduce the risk of shaking, as ignoring the issue may worsen it and compromise driving safety. Always ensure safety measures are in place before troubleshooting.
