Reasons for slight shaking during car idling?
2 Answers
Reasons for slight shaking during car idling: 1. Poor ignition system performance, suboptimal spark plug firing; 2. Unstable oil pressure; 3. Aging engine components or worn engine mounts; 4. Severe engine carbon buildup, dirty throttle body, or excessive fuel injector deposits. Solutions for slight shaking during car idling: 1. Clean the fuel system and check if the idle control valve has carbon deposits that need cleaning; 2. Inspect spark plugs for excessive carbon buildup and replace if necessary; 3. Check oil pressure and replace components when needed; 4. Replace engine rubber components and consider an engine overhaul if appropriate; 5. Perform wheel alignment and dynamic balancing.
My old car shakes a bit at idle, which is a pretty common issue. Often, it's due to worn-out spark plugs, where long-term use leads to carbon buildup causing uneven ignition. It could also be a problem with the ignition coil; unstable electricity supply from the coil can make the engine run rough. Carbon buildup in the throttle body is another key factor—when it's dirty, it causes uneven air intake, leading to shaking. Additionally, aging engine or transmission mounts can harden and crack over time, allowing vibrations to come through at idle. Misfiring is another reason; if one cylinder isn't working properly, the whole engine becomes unbalanced. It's best to start by checking the spark plugs and throttle body, cleaning or replacing them if necessary. If the problem persists, take it to a repair shop to inspect the mounts. Regular maintenance is crucial—idling rough not only increases fuel consumption over time but also risks sudden stalling on the road. Safety first.
