1. Low transmission fluid: Check the transmission fluid level and add more if necessary. Low transmission fluid can cause the gears to slip, resulting in poor acceleration and vibration.
2. Faulty transmission: The transmission may be faulty if the fluid level is correct. This could be due to worn gears, a damaged clutch, or a faulty solenoid. A qualified mechanic will need to diagnose and repair the transmission.
3. Faulty engine mounts: The engine mounts may be worn out, allowing the engine to vibrate excessively. This can cause the car to shake when accelerating. Inspect the engine mounts and replace them if necessary.
4. Faulty spark plugs or ignition coils: Faulty spark plugs or ignition coils can cause the engine to misfire, resulting in poor acceleration and vibration. Check the spark plugs and ignition coils and replace them if necessary.
5. Faulty oxygen sensor: A faulty oxygen sensor can cause the engine to run rich or lean, resulting in poor acceleration and vibration. Check the oxygen sensor and replace it if necessary.
If you are not comfortable performing these checks or repairs, it is best to take your car to a qualified mechanic for diagnosis and repair.
