What are the reasons for the Cadillac ATS-L throttle shaking?
2 Answers
Reasons for car shaking: 1. Excessive carbon deposits: If there is severe carbon buildup in the engine cylinders, it can lead to clogged spark plugs and valves, directly causing the car to shake at idle. 2. Fuel supply system failure: Unstable fuel pressure can easily cause fluctuations in the air-fuel mixture concentration, not only resulting in shaking but also causing unstable idle speed. 3. Aging engine mounts: This is also a common cause of shaking. If the car engine shakes increasingly severely but the power does not weaken accordingly, it may be due to issues with the engine mounts. 4. Misfire or cylinder failure: This is the most common cause of engine shaking, if not the only one. The problem lies in the engine ignition coils or spark plugs. If the ignition coils malfunction or the spark plugs fail to fire for some reason, the car will experience shaking.
I also experienced throttle vibration issues when driving my Cadillac ATS-L, where I felt noticeable steering wheel shaking during highway acceleration. There are several common causes: First, faulty spark plugs or ignition coils—if they're aged or have severe carbon buildup, it can lead to uneven ignition and engine vibration. Second, fuel system blockages, such as dirty fuel injectors or unstable fuel pump pressure. Third, damaged engine mounts where deteriorated rubber cushions reduce vibration absorption. Additionally, worn drive shafts causing transmission imbalance can also induce shaking. These issues not only make driving uncomfortable but may also damage the engine or transmission if ignored long-term. I recommend visiting a professional shop promptly for diagnostic scanner checks and repairs after clearing error codes. In my case, replacing spark plugs resolved it, but solutions vary—don’t delay to prevent further damage.
