What Causes a Car to Shake After Starting?
2 Answers
The reasons for a car shaking after starting are: 1. Insufficient engine power; 2. The vehicle may shake when the clutch is released to the semi-engagement point; 3. Loose connection between the transmission and chassis; 4. Uneven contact between the clutch pressure plate and clutch friction disc; 5. Issues with the coordination between throttle and clutch; 6. Dirty throttle body or excessive carbon buildup in the fuel injectors; 7. Aging engine mounts. Solutions for car shaking after starting include: 1. Controlling the clutch at the optimal engagement point; 2. Replacing the pressure plate and friction disc; 3. Replacing the spark plugs; 4. Cleaning the fuel injectors; 5. Removing carbon deposits. The hazards of car shaking are: 1. Aggravating carbon buildup in the car's engine; 2. Causing poor ignition and spark plug misfires; 3. Accelerating the aging process of engine components.
My car had this issue last year, the whole steering wheel would shake after starting. I thought about it and figured it's most likely a problem with the ignition system. If the spark plugs have been used for a long time, the gap may have widened or the electrodes may have eroded, causing a misfire in one of the cylinders. It could also be that the ignition coils have aged, leading to unstable voltage transmission. Also, don’t forget to check the engine mounts—if the rubber pads are old or broken, engine vibrations can transfer into the cabin. If the shaking is worse when the engine is cold but improves when it’s warm, it might be due to carbon buildup on the throttle body affecting the air intake. Carbon deposits are quite annoying, especially in direct-injection engines, which are particularly prone to them. Also, consider whether you’ve been fueling up at unregulated gas stations, as that can clog the fuel injectors and make the air-fuel mixture uneven. These are all pretty common issues, and if not addressed in time, they can lead to higher fuel consumption and increased engine wear.