No air out of vent under acceleration...

johnboneske · Apr 15, 2016

When driving my Expy, and I accelerate at all, I loose the air coming out of the vent-it goes to the defrost vents. As soon as I let off the gas pedal it comes back out the dash vents. Anyone ever have anything like this happen? How do I fix this?

Bedrck47 · Apr 16, 2016

You have a vacuum leak or a bad connection to the controls. Do you have auto or manual controls?

What year and model is the Expy?

gabeg · Apr 19, 2016

same problem, help me too?

Bedrck47 said:
You have a vacuum leak or a bad connection to the controls. Do you have auto or manual controls?

What year and model is the Expy?

I have the same problem and just today it only comes out the dash no where else. i have a 1999 and the controls are auto

donl · Apr 27, 2016

Same Problem

Just started; 2003 Expedition. I haven't noticed where the air goes but it does stop coming out of the AC vents in the dash. However, if the selector is on Max AC (not the temp selector) no problem.

Mediamonkey11 · Apr 27, 2016

Either you have a vacuum leak in the engine bay like the elbow on the back of the intake or this:

https://youtu.be/PtfucNa6R_o

No air out of vent under acceleration...

johnboneske

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gabeg

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