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Re: question bout a weird noise
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Originally Posted by Jonn
In my 91. at random times, usually sitting still when i hear it, and only if you slightly rev the engine, from behind the dash i get this weird sound as the revs head back to idle, it sounds like vaccum, but.... sounds like some sort of plastic/rubber diaphram is talking, sorta a "burp" sound? like a fluttering valve of some sort, anyone know what this might be? i am only worried about maybe a possible source of a vac. leak or if its something normal. Car does have AC and it works fine as does all the controls, sound only appears with slight revs..
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Shot in the dark time, but I would guess you are hearing the actuator for the blend door in the heat/AC system. It may be starting to leak slightly, causing it to drop the door slightly under low vacuum, then recovering when the throttle closes and vacuum builds.
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...empty gun rack.
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