I have the 185 pulley and when I go to the floor the air coming out goes hot hot real fast like 2 seconds and wont cool again for 3-6 seconds in coast mode. Iam wondering if the vacuum system is losing its stored vacuum and allowing the doors to revert to the uncontrolled "open" position, causing the issue.

Wondering woody?????????????????

prototype fuel boost controller with lots of gauges for watching...............