What are the reasons for noticeable shaking after car maintenance?

1 Answers
JoshuaDella
07/30/25 1:02am
Possible reasons for car shaking after maintenance include engine oil dripping onto the oxygen sensor during the service. Below are some related introductions about car shaking: 1. Causes of car shaking: Car shaking can occur during startup, idle, or high-speed driving. Shaking during startup is mainly due to insufficient fuel combustion, resulting in inadequate power and low ignition energy. During startup, especially when fuel and lubricant temperatures are low, more throttle is needed to meet power demands. The electrode gap of spark plugs gradually widens, leading to decreased ignition energy and poor fuel atomization. 2. Introduction to car shaking during idle: There are many reasons for car shaking during cold starts and warm starts, including not only insufficient fuel combustion but also abnormal engine water temperature, low cylinder pressure, clogged fuel injectors, etc. If the car shakes during startup, it is recommended that the owner promptly take it to a 4S shop for inspection and repair.
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