What are the solutions for idle vibration in the Envision?

[DeMaggie]

The solutions for idle vibration in the Envision are: 1. Clean engine carbon deposits, replace spark plugs, and check the fuel supply pressure. 2. Inspect the engine mounts for signs of aging and replace them if necessary. 3. When there is excessive carbon buildup inside the engine, it can cause idle vibration after a cold start. This happens because excessive carbon deposits absorb a large amount of the sprayed fuel-air mixture, making the mixture too lean and causing difficulty in starting. In this case, the engine can only start once the mixture reaches a certain level, but then the excessive carbon deposits cause the mixture in the cylinders to become too rich, leading to engine vibration.