What are the symptoms of an intake manifold flap failure?

[ElleLee]

Common symptoms of intake manifold flap failure: 1. Engine shaking during cold starts; 2. EPC light and exhaust emission light warnings during driving. The following is an introduction to the intake manifold: 1. Definition: For carburetor or throttle body fuel injection engines, the intake manifold refers to the intake pipe from the carburetor or throttle body to the cylinder head intake port. 2. Function: The intake manifold distributes the air-fuel mixture from the carburetor or throttle body to each cylinder's intake port. For port fuel injection engines or diesel engines, the intake manifold's function is solely to distribute clean air to each cylinder's intake port.