What Causes Automatic Transmission Vehicles to Shake When Starting?

1 Answers
DiMalia
07/29/25 9:34pm
Automatic transmission vehicles may shake when starting due to the following reasons: 1. Engine misfire: This primarily refers to one or more cylinders in the engine not functioning properly, causing intermittent exhaust gas flow and noticeable shaking of the exhaust pipe, sometimes accompanied by abnormal noises; 2. Worn or loose engine mounts: These components are designed to reduce vibrations and absorb shocks during engine operation, while also securing the engine in place; 3. Carbon buildup issues: 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; 4. Fuel system malfunction: Using an incompatible fuel grade can result in reduced vehicle power output.
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