Air Conditioner fan problem

I have noticed the last few months that when my air conditioner is blowing and i accelerate, the air quits blowing out of the vents and then returns
after i reach normal speed. It happens on fresh air and recirculation settings. Has anyone got any suggestions?
RamGuy
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First suggestion is, what vehicle is it? Sounds like a vacuum problem When it quits blowing is it really blowing out the defrosters?
Al
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Duh. I left the good part out didn't I!! It's a 95 ram 1500, 318 2WD. Yes it blows out there.
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Vacuum leak. Possibilities include the cruise control mechanism underneath the battery (battery acid drips and erodes the vacuum line going to the canister, causing a vacuum leak), or a leaking intake plenum gasket. If you remove the PCV valve, and can feel a vacuum when covering it with your thumb (especially when revving the engine), then you have a plenum gasket leak, and will need to remove the intake manifold to repair it.
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the engine and the air cond worked ok and I revved up the engine with it in gear and still ok, but when I drive it, it does is almost immediately. Only for 10 seconds or so. It's not really a big problem but just kinda irritating and hoped it would be simple. I am going to take out the battery and batt holder and check the hoses. I found the canister (I think) under the driver side door with 3 hoses. 1 large one secured good, and 2 smaller ones and one of the smaller ones came out of the boot easily. I'll try and seal it better and try again soon.
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