What causes the car to jerk when releasing the throttle at low speed?
2 Answers
The reasons for the car jerking when releasing the throttle at low speed include: 1. Excessive carbon deposits on the throttle body, fuel injectors, and intake manifold. It is recommended to regularly clean carbon deposits; 2. Poor fuel quality leading to incomplete combustion; 3. Faulty spark plugs or ignition coils causing cylinder misfire; 4. Releasing the clutch too quickly. The jerking when releasing the throttle is a phenomenon known as vehicle surge, which refers to intermittent sudden jerks when starting or releasing the throttle at low speeds. This can cause significant damage to the vehicle's powertrain and transmission system. When encountering this phenomenon, check if the spark plugs have any electrical leakage. Replacing the spark plugs can help troubleshoot the issue. Additionally, it is necessary to inspect the fuel system or ignition system.
I feel the car jerks when releasing the throttle at low speeds, which is quite annoying. The most common cause is a dirty throttle body. I've experienced this issue, especially in city traffic jams where it can be dangerous. The throttle valve doesn't open and close smoothly, causing unstable air intake and fluctuating engine RPM, resulting in jerky movement. Another possible factor is clogged fuel injectors - if fuel can't spray properly, the engine naturally stutters without proper fuel supply. Worn spark plugs could also be the culprit, causing intermittent ignition that affects power output. If there's a transmission issue, such as slipping clutch plates or torque converter failure, releasing the throttle at low speeds can make gear shifts rough. Faulty sensors like the throttle position sensor sending wrong signals can also cause ECU control errors. I recommend checking the throttle body first - you can clean it yourself simply with professional cleaner. If that doesn't work, get it diagnosed at a shop immediately to avoid engine damage. Safety first, as this condition increases rear-end collision risks.
