bbsciontc

yea that doo-hickey you circled is where the sounds comes from. In fact you can even the ticking by putting your hand on it while the car is running. I'll just deal with it...once I get around to installing my exhaust and header, i'm sure I will be more annoyed by other noises.

PghtC

yeah like the rattle I have coming from the hatch....

a little annoyed by that noise.

tC_Brett

that valve is the EVAP system purge valve. It lets fuel vapors into your intake via a vacuum line. The ticking noise is a valve inside opening and closing. It always ticks, but for some reason when installing a cai it gets louder. I noticed it on mine too.

wc01

finally someone that gave me an answer that makes sense.so i guess im screwed huh

Tha_Dude_79

thanks for the heads up i'm about to get my injen cai installed tomorrow.

wc01

it almost makes me want to put the stock intake back on because it makes my whip sound like dog doo when it idles.I don't know about everyone else but it really gets under my skin

mandangalo

vacuum switching valve.....

its # 25860a in this pic...

https://www.scionlife.com/tech/parts...tc05_1_F03.gif

tC_Brett

It really shouldn't be THAT loud. I usually can't hear it with the windows up or even the radion on. If you can hear it when sitting in your car and the radio on at all then it might be something else.

wc01

its not that loud but i can still hear it in the car with the radio off but its the fact i pais alot of money for that car and the cai .It shouldn't sound like ___

tC_Brett

Well, I don't know what to tell you. It's gotta do it's thing or the check engine light will come on. I'm sure you'll get used to it, I don't even hear it any more. It goes away when the car warms up.

wc01

mines ticks after the car warms up but i guess i'll just suck it up and move on.

Sanjuro

I heard that ticking right off after installing the CAI. I put an extra rubber washer in between the intake and the valve cluster and that helped a little but its still present. It never bothered me that much though. I guess thats just me.

Batjew

i bet it's cause the piece on the CAI is a metal bracket, versus the rubber of the stock intake which takes the vibration.

tC_Brett

Good call. That totally makes sense. I'll definately have to get a rubber washer on mine. I have a couple of those sink washers laying around here somewhere. I'll try that here one of these days.

wc01

i think your right Batjew.I'll have to rig something up this weekend

ryno379

You guys that hear the ticking, are your cars 05 or 06 tC's? I started hearing it on my 06 after the S/C install, however, I never heard that sound on my 05.

wc01

mines is a 05

SquallLHeart

that ticking is on every car... starts doing it's job once the car is warmed up..... it's used to control something about warm curb idle.... controled by ecu.. something.. something.. emissions systems.. something something..

vacuum switching valve.. it's just doing it's job.

gwtc

iTrader: (4)

Mines an 05.

sarsippius

There are resonators on the the stock intake that silences this valve. When you install the CAI, you lose the resonator and thus, you here this ticking. It will not go away. It is not any kind of vibration from any brackets, or loose fittings. Just try to deal with it.