Rep Power: 0

yo need help with this i have a 03 civic with a aem intake n old filter n when i car gets in the high rpms it makes this hissing sound before it shifts i thought maybe the filter was bad but i clean it all the time n its pretty clean just not a good brand an ebay one any one know ?

 
Rep Power: 390

they all make that sound- its the air getting sucked in. Higher RPM= more air needed= faster suckage. Although, depending on the kind of hissing, it could be a loose connection between the tube and the filter, a tube and another tube, or the tube and the throttle body. Other that that (assuming no cracks and the sensor isnt lose either) its perfectly normal.

 
Rep Power: 225

agreed sounds like it's the intake. My buddies 02 does this at high rpm's and he's running an aem short ram and high flow filter.

 
Rep Power: 0

yea but i thought maybe if i bought a new like aem filter it wouldent sound like that ? its sounds like your spraying a bottle of hiar spray

 
Rep Power: 390

Its like sucking air through tissue paper, its going to make the same sound no matter the brand of tissue paper.

 
Rep Power: 315

The sounds isnt comming from your tranny is it?

 
Rep Power: 0

idk how would i know i mean i had my tranny rebuilt in aug but its only like beofre the car shifts everytime n i know if i bring it to him hes gonna blame it on the intake u know its sounds like when ur spraying hair spray lol

 
Rep Power: 315

read the first post and tell me if thats your problem.

it is a 5 speed correct?

https://www.civicforums.com/forums/3...save-some.html

 
Rep Power: 0

my 03 ex does the same thing and i have a aem v2 short ram intake with aem filter. i think its just the size of the inlet bringing in lots of air then it has to rush into a smaller area right before your throtle body. my car hisses when i shut it off too so. its normal!