Does this hose need to be connected to my air filter?

[paulri]

I was just checking the oil level on my Sienna, when I noticed something that I hadn't before--a small hose leading into or out from the air filter, was not pressed onto a tube that sticks out from the air filter. I looked online and saw that other Sienna 3.3L engines had this connected.

Does this need to be connected, or should it be?

 

[paulri]

I see from a diagram that this hose is connected the air control valve (below the air filter).

 

[das_peikko]

There should be a vacuum diagram on the hood sticker.

 

[eljefino]

Yes it goes there. You're getting unfiltered air down to that solenoid which would prefer filtered, and a small amount into your air intake as well. It won't run any different but it's sub-optimal.

A zip-tie or cutting that hose 1/2 inch shorter will help it stick better. Probably got shook loose when someone checked/ changed the air filter.

 

[paulri]

OK thanks, I'll go ahead and put it back then. I changed the AF 2-3 months ago, that's probably how it got loose.

Originally Posted by eljefino
Yes it goes there. You're getting unfiltered air down to that solenoid which would prefer filtered, and a small amount into your air intake as well. It won't run any different but it's sub-optimal.

A zip-tie or cutting that hose 1/2 inch shorter will help it stick better. Probably got shook loose when someone checked/ changed the air filter.