Why does the engine shake during acceleration?
2 Answers
The reasons for engine shaking during acceleration are: 1. Fuel system malfunction; 2. Electrical circuit malfunction; 3. Mechanical malfunction. The solutions are: 1. Clean the fuel system; 2. Check if the idle speed motor has carbon deposits and clean if necessary; 3. For a period of time, drive at low gear with high speed to increase engine RPM. An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc. For example, a jet engine refers to an engine that directly generates thrust by the high-speed airflow ejected from the nozzle, widely used as the power device for aircraft.
I've been repairing cars for nearly twenty years, and engine shaking during acceleration is a common issue. The most frequent cause is problems with the ignition system. Over time, spark plugs develop larger gaps or electrode erosion, leading to misfires, which makes the engine shake. Last time, a customer's car was shaking like a sieve during acceleration, but replacing the entire set with iridium spark plugs immediately stabilized it. Another common issue is high-voltage coil leakage, especially noticeable on rainy days. Opening the engine cover reveals frost-like residue on the coils. Don’t overlook engine mount deterioration either—cracked rubber means loss of damping, causing severe shaking during hard acceleration that makes the steering wheel hard to hold. For such issues, I always start by checking the misfire data stream with a diagnostic tool and troubleshoot step by step, which is far better than blindly replacing parts.
