When I turn on the A/C vents to the dashboard they switch to the defrost vents when I accelerate and switch back when I let of the pedal,can't find what is causing this my though was a bas vacuum line but can't find which, has anyone had this problem and can help piont me in the right direction. Thanks

 

Do a search for 'wild vents' or 'crazy vents' to find the fix.

 

also see "check valves". there's 2 of them on passenger side between intake and firewall.

 

ck your vac line to the cruise servo under the battery

 

Thanks for all who replied, After looking over all the search threads on wild vents I came up with a plan to check on my vac lines. My 01 had a check valve already in place to the a/c vents, so I checked it with a vac gauge and it was good I then checked each line and they were good I then checked the check valve right after the manifold and found that one bad and replaced it with a new elbow to fit the new check valve and no more wild vents. Go figure repaired it all for under $6.00. Thanks again for all the help.

 

the one on the side of the manifold gets gummed up with oil vapors over time. mine and my dads trucks both had a bad one on the side of the manifold.

 

Was the valve purchased at the dealer? Do you have the part#?

 

https://dodgeforum.com/forum/2nd-gen...help-guys.html

 

Ram4ever,

What type of vac check tool did you use?

 

I used a mighty vac hand held vacuum pump or better know as a brake bleeder. I bought the check valve at pep boys and it was on the shelf with all the other vac line parts, that;s why I had to buy the one other fitting to adapt to the size for the outlet off the mainfold, it was a elbow.And also I had the vac from when I changed my brake lines.