What are the symptoms of a faulty variable intake manifold?

[VanAniyah]

The symptoms of a faulty variable intake manifold include reduced intake capacity, decreased engine power, insufficient air intake, and increased engine carbon deposits. Function of the intake manifold: For carburetor or throttle body fuel injection engines, the intake manifold refers to the intake pipe from the carburetor or throttle body to the intake port of the cylinder head. Its function is to distribute the air-fuel mixture from the carburetor or throttle body to the intake ports of each cylinder. Advantages of plastic intake manifolds: Lower cost and lighter weight. Additionally, since PA has lower thermal conductivity than aluminum, the fuel injectors and incoming air temperature are lower. This not only improves hot start performance and increases engine power and torque, but also helps avoid heat loss in the pipe during cold starts, speeding up the increase in gas temperature. Moreover, the smooth inner walls of plastic intake manifolds reduce air flow resistance, thereby enhancing engine performance.