specific analysis:Р(1) engine start-up difficultiesР 1, maintenance examples Р Models: Shanghai Passat B5 sedans. Р Fault phenomenon: hot car engine to start normally, and when cold, especially in the morning when starting the first time, start difficulties. Р Diagnosis and rule out the possibility: from fault symptoms analysis, fault should be in the fuel supply system. In the fuel pipe connected to a dedicated fuel pressure gauge to check fuel pump check valve leak tightness, start the engine, check fuel system pressure, normal. Close the fuel pressure gauge on the valve, at the same time work to stop the engine, fuel pressure gauge at this time the instructions on the value of approximately 400KP. Observed after 10min, the pressure is about 70KPa, note the system has leaked Department.
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