Vent noise on 2nd gen Taco

At idle my truck has these strange vent noises that go away as soon as you give the truck a little bit of throttle. It almost seems like a vacuum issue but it appears all the vents are control electrically. Any suggestions? Thanks

 

There are a couple of access covers that you can remove from the passenger side footwell area that will let you see the position of the heat and recirc doors. If they are moving a bit while at idle, you may be able to spot it there.

Here’s a post with an annotated pic of what I’m referring to.

 

Thanks for the reply but the noise I am dealing with is totally different and happens at any time and makes no difference in which vent cycle is on. It also makes no difference whether the air is on or off or if the vehicle vent system is set to recycle.The noise totally reminds me of vehicles I have had in the past that had a leaky vacuum line to the vent system. When you give the vehicle throttle the vacuum drops and the noise disappears. As soon a you let off the throttle the high vacuum returns and the noise continues to go on and off depending on throttle position. I was hoping someone else had a similar problem and fix before I start tearing everything apart. Cheers

 

Can you get a video of noise?