What to Do When the Engine Shakes at Idle After Cold Start?

[DelMelanie]

Severe shaking during cold starts may indicate engine mechanical faults or intake system issues. Solutions are as follows: 1. Replace the engine oil promptly. If the oil turns black, becomes thin, or contains grit, stop using it immediately. Prolonged use of unchanged or deteriorated oil not only fails to lubricate but also damages the engine. It is advisable to replace the oil filter simultaneously during an oil change to prevent contaminants from the old filter from compromising the new oil's quality. 2. Use lower-viscosity oil. Oil with lower viscosity flows better, effectively reducing engine wear. 3. Preheat the car before a cold start. This primarily reduces wear, allowing the engine to reach normal operating clearances and maintain optimal working conditions.