1996 Dodge Ram 2500 Q&A

1996 Dodge Ram 2500 Question: air vent close when i accelerate on freeway

my air works good but i notice when i am on the freeway and accelerate quickly the vents shut until i let off the gas. -
Answer 1
This is indicating a vacuum leak in the climate control vent system. The airflow to the vents is controlled by vacuum controlled diaphragms, and if there is a leak, this is the symptom. -