I'm assuming block both tailpipes, and check the pressure of each hoses?
Yeah, he wants you to build some pressure in the exhaust to see if it makes it up through the sensor pipes.I'm assuming block both tailpipes, and check the pressure of each hoses?
There should definitely be a pressure difference across the DPF when the engine is running, and it should increase with load and RPM.
-Uwe-
avisonjohn,
Are you 100% sure the pipes are on the right connections? To check what the engine management is seeing, apply some low pressure to the pre DPF inlet on the sensor and see what the data say's.
Regards HMC
Still not sure which one is the inlet and which is the outlet??
The sensor has one small nozzle, and slightly larger
The best way to get the correct information for your vehicle is to create an account on the erWin Audi website https://erwin.audi.com/erwin/showHome.do and buy a 1 hour subscription then enter your VIN and download every document offered as a pdf.is there an actual workshop book available?
VCDS doesn't measure. Your car measures. VCDS just reports what the car knows and is willing to divulge. The engineering for the car and its systems was done in Germany, a country that has been on the metric system "forever". Hence you will see metric units. mbar, or hPa or something like that.1 - does VCDS measure in mbar, bar, or PSI?
Disk space is cheap. Grab everything they have for your car.2 - is there something on Erwin that I should specifically be looking to download? I'm happy to pay again, but not entirely sure where I need to be looking