Originally Posted by mrrmobile
I have this same problem on my '03. Most of the time it works fine, but when on long trips on the interstate with cruise set, it will all of the sudden stop blowing air through the vents. If you sit at idle for a few minutes, it goes back to normal function. I am thinking maybe I have a vacuum leak? I'm not familiar to this system so I don't know if it is even a vacuum run system... Any ideas anyone?
Turns out I am not home free on this vac tank/non-vac tank issue as my new used 2000 Ram still shut off a/c dash ducts under heavy acel today.
I may have to install an /Alfa Romeo 164 vac tank inline at firewall to combat this issue.
Don't make me go Un_American guys, tell me where the darm vac tank is located on this 2K Ram.