
Reasons for slight shaking after car startup include a dirty throttle body and increased spark plug gap. Below are detailed explanations of the causes of slight shaking after car startup: Dirty Throttle Body: A dirty throttle body or excessive carbon buildup in the fuel injectors can cause slight shaking after car startup. If disassembling the intake tract for cleaning is not feasible, you can use a no-disassembly fuel system cleaning device, although the results may not be as ideal as disassembly. Increased Spark Plug Gap: After prolonged use, the spark plug gap may increase. Depending on the situation, you can clean the spark plugs or adjust the gap and continue using them.


