986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Idle revving 1-2 k after engine swap

Stl-986 · 05-28-2021, 07:07 PM

Doubt it's a maf issue. Sounds like a vacuum leak. could be the hoses, connectors, plenum , check valve, aos, reservoir. if you can get a vac gauge you can hook it up to any of the vac. lines and see what you are getting. should be 12-18 in.

Since it's doing this after an engine swap it's also possible you dont have something hooked up right.

05-28-2021, 07:07 PM	#8
Stl-986 Registered User Join Date: May 2017 Posts: 1,182	Doubt it's a maf issue. Sounds like a vacuum leak. could be the hoses, connectors, plenum , check valve, aos, reservoir. if you can get a vac gauge you can hook it up to any of the vac. lines and see what you are getting. should be 12-18 in. Since it's doing this after an engine swap it's also possible you dont have something hooked up right. __________________ 2000 Boxster Tiptronic 2003 Boxster 2003 996 C2 Cab 2002 996 (SOLD) 1986 944 (gone but missed)