VSV / vapor pressure sensor

Hearing an odd sound and having trouble diagnosing and locating.any help would be very appreciated.
A buzzing sound is coming from around the VSV charcoal canister area that happen every 10 seconds ish. This happens when car is off and key is out of Ignition.

Thanks!

 

Is the noise from a 3rd gen Tacoma?
They have a small vacuum pump which runs when engine is off.
Part of the normal EVAP cycle.

 

First gen.

 

With engine off, remove gas cap and listen for said noise. If noise is gone as long as cap is off the sound is from an EVAP purge cycle.

 

Every ten seconds and like a buzz sound ? Like when ur phone vibrates?

 

Still making the sound with gas cap off?

 

No. Have not tried. I’m not back to my truck for 6 days. But that will be what I try next!

 

Cannister Purge Selnoid is the vacuum switching valve allowing EVAP from tank into cannister. This valve is open when key off to allow vapor flow to cannister where hydrocarbons are captured instead of being released into environment. Protects fuel system from pressure build up and resulting damage. Vac hoses don't last forever. Silicone vac hoss replacement is a good alternative to interior hose degradation.

 

so it will continue to make that sound even if parked for weeks ?

 

Why can’t I upload a video ??

 

Try to imagine a plastic gas can swelling and shrinking over a 24 hour period. Now add a 3/8" 25 year old rubber hose that's degraded inside and restricted flow acting like the Reed in a musical wind instrument like a flute.

 

https://youtu.be/1TK2xex4mY0

 

I have a video on my iPhone why can’t I upload it? Grr

 

Put the video on YouTube and copy the URL to post it on TW

 

Does your canister have this? I took one off another one and glued it to mine and the buzzing stopped.

 

Doesn’t not.

 

Ha ha doesn't not means it does
Double negative

 

Lol! Yes.
Does not have that.

 

It's how I fixed my buzzing but not sure if it was the actual cause or what. It was the only thing I modified though so I'm pretty sure it helped.

 

https://youtu.be/3SzEjebcR74