I installed my intake today and then didnt drive it til later on in the day and it has a distinct and very loud hissing sound coming from the front. This happen to anyone else? Any advice?

 

Hissing sound? did you tighten down everything?

Could just be air being sucked in and you're not used to it.

 

or a vac. leak.
did u screw with the solenoid?

 

not besides what the instructions said

 

There is a hissing-like sound when you are idling, and it is very common on almost every type of car I have ever seen after the intake has been upgraded.

By the way if you searched you would've found this thread : https://www.scionlife.com/forums/viewtopic.php?t=20939

 

are you sure you arent talking about the "whistle"

 

mine whistles when driving, but never heard of it 'hissing' and i've had mine for 2 years

 

it sounds like a blow off valve almost. I talked to a friend of mine who works for toyota and he thinks its cause of poor "breathing" room. So I am going to drill some holes into the splash guard and the vrd vents

 

...

no..... if it's the common whistle people are talking about... that's just normal...

doing what you're thinking of doing won't fix anything.

 

X2! that's the point I have been trying to get across.

 

yeah I am starting to realize that. I dont like that whistle at all but I'm goin to have to deal with it until I can get another intake. Any idea on what intake wont whistle? Sorry I'm a total noob

 

they all make some form of whistle or another.Weapon r is short ram and does not make a whistle to speak of but it makes other weird growls and noises that you amy not like either....they all make noise.

 

its just so loud, makes me feel like the tube is muffed up