View Single Post
Old 11-01-2020, 01:13 PM   #6
911monty
Registered User
 
911monty's Avatar
 
Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
Garage
My 98 "breathes" exactly as yours does. At first I was concerned until I realized what is happening. With throttle closed and max vacuum in intake plenums, everything is drawn together. When the throttle is opened intake manifold vacuum drops and the intake manifolds relax appearing to expand. I may be wrong.
911monty is offline   Reply With Quote