What Causes Jerking When Accelerating in an Automatic Transmission?
2 Answers
Experiencing jerking when pressing the accelerator is a normal phenomenon, but sometimes it may indicate a vehicle malfunction that requires timely inspection. The reasons for jerking when accelerating are as follows: 1. Severe carbon buildup in the throttle body, fuel injectors, or intake manifold: Carbon deposits can easily cause jerking when accelerating. Regular inspection and cleaning of carbon deposits in these components are essential. 2. Poor fuel quality: Low-quality fuel often leads to incomplete combustion, resulting in carbon residue and engine malfunctions. It is recommended to use high-quality fuel for your vehicle. 3. Faulty spark plugs or ignition coils: Issues with spark plugs or ignition coils can cause misfires or cylinder failures, preventing proper ignition. It is advisable to visit a repair shop for inspection and timely maintenance to avoid potential safety hazards.
I used to work in a repair shop, and the most common cause of jerking when accelerating in an automatic transmission is internal transmission issues. Old or insufficient transmission fluid can obstruct normal oil pressure flow, leading to rough shifting. Clogged or damaged solenoid valves can disrupt shift timing, while improper torque converter lock-up can cause surging during acceleration. Engine-related issues like faulty ignition coils or spark plugs may also trigger this, as they cause unstable power output. I recommend first checking the transmission fluid's color and level yourself—if it's black or contains debris, it should be replaced. For severe cases, visit a professional shop to read fault codes with an OBD scanner. Don’t delay, as it could escalate transmission damage and costs. Remember, the transmission is a core component—regular maintenance is key to preventing jerking. Changing the fluid every 40,000 km is generally sufficient.
