dash vents cutting out

[john shelman]

my dash vents cut out when i accelerate, return to normal when i let off the gas. just fine around town or on level road, how do i fix this?

 

[JExpedition07]

Sounds like a vacuum leak or a vacuum check valve

 

[1955moose]

Do you have the eatc setup, or the manual knob type?

Sent from my N9131 using Tapatalk

 

[Hamfisted]

my dash vents cut out when i accelerate, return to normal when i let off the gas. just fine around town or on level road, how do i fix this?

Has anyone been working under the hood lately ? Most times it's caused when someone knocks the hot water valve's vacuum tube off. Like when someone does a sparkplug change, or even an oil change.

Check that this vacuum tube is still connected to the hot water valve....





And no leaks in these lines going into/out of the firewall ....









-Ham