What are the symptoms of a faulty intake manifold check valve in the Excelle?

[StJaxson]

Symptoms of a faulty check valve in the Excelle are as follows: 1. Increased air flow velocity at the carburetor throat; 2. Increased fuel discharge from the injector, leading to higher fuel consumption; 3. The vacuum degree in the intake manifold increases with the opening of the throttle valve. Below is relevant information about check valves: 1. Types: Check valves come in two types: straight-through and right-angle. Straight-through check valves are installed on pipelines via threaded connections. Right-angle check valves have three forms: threaded connection, plate connection, and flange connection. 2. Hydraulic control check valve: Also known as a lock valve or pressure-holding valve, it functions similarly to a check valve by preventing reverse flow of oil. However, in hydraulic circuits where reverse oil flow is required, control oil pressure can be used to open the check valve, allowing oil flow in both directions.