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What Causes Engine Vibration?

2 Answers

CharlotteLee

07/29/25 7:25am

Engine vibration can be attributed to the following reasons: 1. Engine misfire: This primarily refers to one or more cylinders in the engine not functioning properly. Common symptoms include intermittent exhaust flow, severe shaking of the exhaust pipe, noticeable engine vibration, and sometimes accompanied by a sputtering sound. This is often related to ignition coil failure. 2. Worn or loose engine mounts: Engine mounts are rubber blocks placed between the engine and the frame. Their purpose is to reduce vibrations and absorb shocks during engine operation, while also securing the engine in place. If these mounts become worn or loose, engine vibration can become significantly worse. Replacing the engine mounts can greatly reduce the vibration. 3. Carbon buildup: Carbon buildup is an unavoidable issue in cars, including carbon deposits in the cylinders, throttle body, spark plugs, and intake system. Excessive carbon buildup inside the engine can affect ignition energy, air intake efficiency, and the air-fuel mixture ratio, leading to unstable power output and vibration during idling and acceleration. It is recommended to visit a 4S shop for an engine cleaning service to address this issue.

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Costa

08/12/25 10:43am

There are many causes of engine shaking. Having driven for over 20 years, common issues include weak ignition systems, aged or non-firing spark plugs, and faulty ignition coils, which lead to cylinder imbalance during engine operation. When fuel supply is insufficient, injectors may clog, or a failing fuel pump causes unstable fuel delivery, making the car struggle to move and shake. A dirty intake system or clogged air filter can make the engine 'gasp for air,' with noticeable shaking at idle. Loose engine mounts or damaged rubber bushings fail to secure the engine, worsening shaking during acceleration or stopping. Carbon buildup on pistons or intake valves also affects combustion efficiency. It's advisable to check these areas during regular maintenance and address shaking early before minor issues become major problems. A quick inspection at a repair shop can pinpoint the issue.

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