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Stl-986 · 07-17-2021, 05:52 PM

Disconnected vacuum line on 18 that goes into the T at the cannister, no difference.

Another test I did was to just disconnect the check valve at the plenum and put my gauge there. Get the same 8hg.

Starting to look like it's an issue with the intake, plenum or flapper in the plennum.

07-17-2021, 05:52 PM	#26
Stl-986 Registered User Join Date: May 2017 Posts: 1,180	Disconnected vacuum line on 18 that goes into the T at the cannister, no difference. Another test I did was to just disconnect the check valve at the plenum and put my gauge there. Get the same 8hg. Starting to look like it's an issue with the intake, plenum or flapper in the plennum. __________________ 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed)