Why does the new car have difficulty accelerating and jerking?
3 Answers
New car having difficulty accelerating and jerking may be caused by the following reasons: 1. Clutch slipping. When you step hard on the accelerator, the engine speed rises quickly, but the vehicle speed does not increase accordingly, and you can clearly feel a state of weak acceleration. 2. Poor quality fuel used can affect the gasoline filter and fuel lines, leading to poor fuel supply and resulting in weak acceleration. 3. Carbon deposits accumulated on the throttle valve can affect the air intake, leading to insufficient engine power and weak acceleration when stepping on the gas. 4. Issues with the filter. Regularly clean the fuel filter to prevent excessive impurities in the fuel from clogging the fuel injectors. 5. The car has a small displacement and is carrying too much weight. If this is the case, it is a normal phenomenon.
My car had a similar issue before. The new car lacked power during acceleration and felt jerky, which is mostly related to fuel or ignition system problems. For example, poor fuel quality or filling up with substandard gasoline can clog the fuel injectors, leading to insufficient fuel supply. The engine then 'struggles to breathe,' resulting in weak acceleration and stuttering. Another possibility is aging ignition coils or spark plugs. Last time with my new car, the spark plugs weren't properly installed, causing incomplete combustion, which made the car jerk. Additionally, the break-in period for a new car is crucial. Components haven't fully adapted yet, and frequent hard acceleration can worsen the problem. I suggest first trying a reputable gas station for better fuel, then checking if the air filter is dirty—if it's clogged, it can also affect acceleration. If that doesn't help, take it back to the dealership for diagnosis. They have professional scanners to check the ECU system. Don't delay too long, or a minor issue could turn into major repairs. Drive gently in daily use, avoid stomping on the gas pedal, and it'll help extend component lifespan.
My friend's brand-new car has severe jerking and acceleration issues right after delivery. I helped check it, and it's likely an electronic control system malfunction. Modern new cars rely on ECU computer management—if sensors like the mass airflow sensor malfunction, the ECU receives inaccurate signals and misfires fuel delivery, causing unstable acceleration. Another possibility is loose wiring connections; new cars have complex wiring harnesses that may come loose, leading to intermittent fuel pump operation. I once used a diagnostic tool to scan for trouble codes, which quickly pinpointed the issue. There’s also a chance the OBD system doesn’t report errors despite underlying risks. For new cars, it’s best not to tinker blindly—just take it back to the 4S dealership for warranty inspection. Combining computer diagnostics with manual checks saves time and ensures efficiency. A reminder: always refuel at reputable gas stations, as poor-quality fuel is a common culprit. Address the issue promptly to prevent performance degradation.
