brianteel

I was in my Fiances car the other day and we were driving and every time she got on the gas the AC would change the vents to the dash and floor. I am sure this is all vaccum control. anyone experience this and know a fix for it.

Bert

That's definitly a vacuum problem. Start under the hood and follow the hoses as they go to the interior. There's also a check valve and reservoir that can hav a problem. Someone else may pop in and have more detailed info.

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Bert

brianteel

that is what i figure it is, trying to find out if this is common or something rare

Bert

I figured you knew it was vacuum related but thought I'd reinforce your idea. As for being a common problem, I don't know about that.

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Bert

brianteel

i was playing with radio over the winter and i think i might knocked something loose. just thought it about it tonight

brianteel

it has been a while but i got a chance to check all of the vacuum lines and they all seem to be connected right. does anyone have a vacuum diagram of HVAC and engine lines to i have trace and check everything. I am thinking maybe a check valve or something might be bad if it uses them.

jwko

Start at A13 in the diagram below.





Possible Causes

* Vacuum hose(s) restricted or broken
* Vacuum control motor
* Airflow control door(s)
* Function selector switch
* A/C vacuum check valve
* A/C vacuum reservoir tank
* Stuck or bound linkage or blend door