Harmonic_tC

I reeally hate to post this but i recently installed my Injen CAI and im lovin it. It sounds great, looks great, and performs pretty well for a CAI. But the famous whistle sound is now really loud which i knew going into buying the CAI. We all have our opinions on what this is generated form IE the throttle body but im not sure if thats actually it. Half the time when im driving (and not floord just normal driving) It will whistle constantly which sounds like a bad air leak. I was just wondering if anyone has tried to track where this is coming from? When installing the the intake there was the "evap service port" which had to get remounted and i noticed that on the tag it said to have a 1psi max pressure. I took off the green cap and all it looks like is a valve stem from a tire. Im not going to mess with it but im wondering if some how that nozzle is releasing pressure so it does not damage itself. And my thoughts on why its louder would be that its getting alot more air through the hose and so now its releasing more air. Im purly not complaining but it is pretty loud and i do get some stares at my hood as i pass others, i can deal with the noise but being a sort of a techie i like to see why stuff happens.

Anyways, any thoughts??

mikek6789

lol, thats yours intake, its hissing right?

dont worry, thats how all of them are.. basically your car is choking, there was a post earliar called 'truth about intakes', go read that one...

Harmonic_tC

yeah, know its the intake, but ill go check that thread

mikek6789

here it is https://www.scionlife.com/forums/viewtopic.php?t=70230

B1uEsC1uEs

Does it do that turbo whistle sound? Cause mine does and i love it. It makes my car sound like its turbocharged. hahaha

Harmonic_tC

haha, yeah the turbo screetching sound. oh well after reading a 3 page bash fest that mike recomended i guess there is no real hope. I was just curious.

RSracer

Yea, that was a pretty bad bash fest...

The whistling sound is caused by air friction and you will almost always have it with an after market intake.

Since your car is naturally aspirated, for you to lessen the sound you would have to get your engine's VE to maximum potential which is hard to do without machine work and money.