Quote:
Originally Posted by Stl-986
the vacuum lines, change over, cannister, check valve, sai are all part of the air induction system, same as ours. EVAP is for the fuel system. Only thing different on his car would be the secondary O2 sensors not being present and a ROW tune, otherwise it is the same as us spec. On RHD the location of a couple parts will just be different, but they will still be there such as the vacuum line to the fuel damper (on the right side of engine instead of left). The intake & vacuum system are all the same as US cars. EVAP is going to be at the front of the car like ours in the right wheel well.
You can get the row PET from here: https://www.porsche.com/central-eastern-europe/en/accessoriesandservice/classic/genuineparts/originalpartscatalogue/
The vacuum cannister is circled in blue: |
I did not realize that Euro spec. cars had SAI. thanks for pointing that out.
Even thou the components for the EVAP. system are in the wheel well. The system is still put under vacuum for leak testing by the DME/ECU. So it is connect to a manifold vacuum source somehow.
If you have things like changeover valves, check valves, charcoal cannisters, vacuum cannisters, included as part of various vacuum test you run a high risk of inaccurate and misleading readings.
If a valve energizes and opens to something like a vacuum cannister while your doing a exhaust restriction test. The needle on the gauge is going to drop slowly just like it would if the exhaust is restricted. That is why you isolate as many vacuum operated systems as possible from those types of tests.
That is why I tell the OP to run his test either without the check valve connected or to run two test one with it connected and one without it connected.
What the system is called downstream of the check valve I couldn't care less.
I know it has a vacuum component that can skew the test.
When I tell the OP to include or don't include check valve in the test. he knows what I mean.