What are the causes of engine shaking when stepping on the accelerator?
3 Answers
The causes of engine shaking when stepping on the accelerator are: 1. Unstable engine operation; 2. Loose cooling fan; 3. Loose engine mounts and air conditioning compressor; 4. Weak air conditioning signal voltage; 5. Dirty throttle or excessive carbon deposits in the fuel injectors. The solutions for engine shaking are: 1. Replace brake pads and brake discs; 2. Remove carbon deposits from the engine; 3. Change fuel quality; 4. Replace spark plugs; 5. Insufficient cylinder pressure. The function of the engine is to convert the thermal energy of gasoline into mechanical energy by burning and expanding gas in a sealed cylinder to push the piston to do work. Types of engines include piston engines, ramjet engines, rocket engines, and turbine engines.
Last time my car also had the issue of shaking when stepping on the accelerator, and it turned out to be severe carbon buildup on the spark plugs. The mechanic said this is quite common, as carbon deposits can affect ignition efficiency. Additionally, aging ignition coils or leaking high-voltage wires can also cause the engine to shake during operation, feeling like a loss of power similar to a misfire. Another possibility is a dirty throttle body, where stepping on the accelerator leads to poor air intake and unstable combustion. I recommend first reading the trouble codes and checking the air filter and spark plugs yourself. If that doesn’t help, it’s best to seek professional repair services, as driving safety comes first—never ignore the issue.
I've encountered this issue twice. The first time was due to clogged fuel injectors, causing uneven fuel injection when stepping on the accelerator and making the engine shake. The second time was because the engine mount rubber pads had aged, and pressing the accelerator made the entire engine compartment vibrate. I recommend paying attention to the RPM when the shaking occurs. If it's noticeable at low speeds but improves at high speeds, it's likely an ignition system problem. If it keeps shaking consistently, you might need to check the engine mounts. Regular fuel system cleaning and using quality gasoline can prevent many of these issues.
