Subaru Outback Forums banner
1 - 1 of 1 Posts

·
Premium Member
01 VDC, 05 R Sedan, 06 BAJA EJ257
Joined
·
16,645 Posts
That's a PCV hose and the fumes were gases created from within the crankcase. Disconnected it creates a vacuum leak which alters the fuel trims.
 
1 - 1 of 1 Posts
Top