What Are the Causes of Engine Shaking?
2 Answers
Engine shaking causes: 1. Faulty car ignition system; 2. Poor fuel quality affecting engine performance; 3. Severe engine carbon buildup leading to power loss; 4. Unstable oil pressure causing poor fuel supply; 5. Abnormal water temperature altering ignition timing and affecting engine lubrication. An engine (Engine) is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The term engine can refer to either the power generation device or the entire machine including the power unit.
Engine shaking is such a common issue. I just fixed a car with this problem. It's 80% likely the spark plugs need replacing – regular copper-core plugs last about 30,000 km, while platinum or iridium ones can go up to 100,000 km. If the engine has unstable RPM and lacks power, focus on checking the ignition coils and high-voltage wires, as aged wiring with electrical leakage often causes cylinder misfire shaking. Don't overlook the fuel system either – clogged fuel pump filters or poor fuel injector atomization can affect the air-fuel mixture. I once encountered a vacuum hose leak case where an old Passat shook like a sieve; soapy water testing revealed a cracked intake pipe behind the throttle body. Worn engine mounts are more obvious – the whole car vibrates in D gear when braking, but replacing them brings instant stability. By the way, out-of-round engine pulley can also cause resonance shaking, especially in cars with lightweight flywheel modifications. Final reminder: severe shaking requires immediate inspection – small issues left unattended can lead to cylinder scoring with huge losses.
