Why is there a hissing sound after starting the car?

[BennettRose]

The reason for the hissing sound after starting the car is that there is damage or air leakage in the hose on the engine intake manifold. It should be repaired or replaced at a maintenance shop in time. The following is a related introduction to the intake manifold: 1. Meaning For carburetor or throttle body gasoline injection engines, the intake manifold refers to the intake pipe from the carburetor or throttle body to the intake port of the cylinder head. 2. Function: The function of the intake manifold is to distribute the air-fuel mixture from the carburetor or throttle body to the intake ports of each cylinder. For port fuel injection engines or diesel engines, the function of the intake manifold is only to distribute clean air to the intake ports of each cylinder.