Disabling fuel system leak detection pump

Anyone who has slept in their truck has probably heard it—that mechanical compressor-like humming noise coming from the fuel tank area. I’ve read that it has to do with emissions and that it is leak checking the fuel system.

Great. But frankly, I’m tired of having to listen to it kicking in and off in the middle of the night while trying to sleep in my roof top tent.

Is there any way to temporarily disable it while camped?

 

Disconnect the battery.

 

Obviously, but I’m looking for something that will allow me to not have to remove power from the entire truck.

 

I would probably just live with it.
If you were able to somehow disconnect it and it wasn't allowed to do its thing, there could be codes thrown. It is emissions related and if not allowed to properly test then it could have ill effects on engine runability.
I don't know this for sure, but it would be something to think about.

 

You must have some really sensitive hearing. When my wife’s 16 T4R does it I can’t really even hear it

 

We camp in some extremely remote, VERY quiet locations... it resonates quite loudly through the bed, rails and base of the tent. It's FAR from quiet.

 

I searched the pump online and found the part listed for the latest Tacomas.

Depending on the location of the air pump and accessibility, you could try sticking some Dynamat or Boom Mat sound deadener on it and then either wrap it or enclose it in some polyethylene or neoprene closed cell foam.

That might take the sound down just a few dB.

 

*** Camp at Walmart. Parking lot.

 

https://www.amazon.com/Super-Sleep-Comfort-Foam-Plugs/dp/B00747BMZY

 

I agree , it is annoying. The one solution I have found is to start the motor briefly maybe even get some heat and it’ll delay the pump checking. I never did figure out the exact timing of it but I’ve got to go pretty good were we could sleep most of the night pump free.

 

I think it comes on about 5 hours after you shut it off, running the truck would definitely delay it again.

 

Just get some rubber insulating spray and spray it on the bed above the fuel cell. Then get a thick insulating blanket and throw it around fuel cell before going to sleep. And to crawl under, grab a big piece of cardboard to keep underneath the bed mat, assuming you have one, if not get one, it'll help too!

Edit: Ear plugs might help too.

Hope that helps
Cheers!

 

What about this? Could it be related? I've noticed the sound before, and wondered what it was. I searched YouTube and this is what I found. I am going to try to open the gas cap next time I hear it. But maybe you guys know for sure that it is a leak checking system in operation...

https://youtu.be/QPVkNLvncLU

 

Remove it after shut off...

If after you replace it you get no codes you got a winner...

 

exactly what I was going to suggest.

 

Has anyone tried the fuse method? The buzzing noise wakes me up every night.

 

You sleep in your truck every night?

 

Well, I guess only the nights when the buzzing wakes me up.