What is the channel number for the intake manifold pressure of a Volkswagen?
2 Answers
Volkswagen fuel pressure data stream channel number is data stream group 140. Here is the relevant information: 1. Gasoline pressure: Depending on the model, gasoline pressure may vary. Most are around 300kpa, which is generally normal. Insufficient fuel pressure can cause difficulties in starting, stalling, and weak acceleration. 2. High-pressure direct injector: The high-pressure direct injector is supplied with high-pressure fuel by the high-pressure pump, which is then distributed to the high-pressure direct injector through the high-pressure fuel distribution pipe; low-pressure fuel is supplied by the high-pressure pump's guide connection device, and the fuel then enters the low-pressure fuel rail.
When repairing cars, I found there are tricks to reading intake manifold pressure on Volkswagen vehicles. For older EA111/888 engines, connect via 5053 cable to the OBD port, enter the engine module and select Channel 115 to view real-time pressure values. But for newer MQB platform vehicles, you need to use the ODIS diagnostic tool, enter the Engine Control Unit - Advanced Measuring Values, and directly search for 'Intake Pressure' instead of memorizing channel numbers. This parameter is particularly crucial as it determines the air-fuel mixture concentration. If the pressure exceeds 35 kPa, there's an 80% chance of an air leak. Last week, I encountered a Sagitar with an EPC light on, which was caused by a cracked manifold leading to abnormal pressure and triggering a turbo boost pressure too low fault code. Replacing the hose fixed the issue.
