How to remove the throttle pipe of Buick Angkewei 1.5?

Need to go to a professional repair shop to disassemble.

The black pipe on the valve cover of Buick Angkewei is an exhaust pipe, which needs to be disassembled in a professional repair shop. Exhaust gas enters the throttle valve for the second time through the exhaust pipe to participate in combustion. If the exhaust pipe is blocked, the engine pressure will increase, which will easily lead to oil combustion. It will affect the working efficiency of the engine and reduce the power of the car; It will produce abnormal noise, unstable idle speed or poor acceleration when the engine is running, and the overtaking performance will be reduced. In severe cases, it will also lead to engine starting difficulties, flameout, air leakage or increased carbon deposition in the car. Valve rupture will lead to unstable cylinder operation, leading to engine jitter, engine failure, exhaust pipe blockage, and even black smoke in severe cases.