06-EVO-9-MR

iTrader: (2)

When I take my foot of the gas at lower rmp's it will make a fluttering noise and jerk the car a little. I first noticed it after I got an upgraded intercooler put on. Is this okay or do I need to do something about it? It does get Anoying....

boostin350z

iTrader: (4)

try loosening it up as just read on a similar situation.

06-EVO-9-MR

iTrader: (2)

Loosen what up? The bov it self?

BBS

iTrader: (18)

Who installed the intercooler? My primary intuition says that they reinstalled the diverter valve incorrectly which is a common mistake.

09Ralli

iTrader: (4)

Mine does this sometimes also only at low low rpms

fromWRXtoEVO

iTrader: (18)

Loosening what up? Can you elaborate?

Carlos

hazdaddy

iTrader: (1)

mine does that too. it is quite annoying. i have a stock fmic though, so im guessing it must be on the wrong way?

boostin350z

iTrader: (4)

here seems to be a similar situation and your answer

https://www.evolutionm.net/forums/ev...s-already.html

k2evo

iTrader: (1)

+1

Check the DV. The bottom port should be on the UICP.

06-EVO-9-MR

iTrader: (2)

The dv is fine and was never touched during the install. Any other possibilities?

06-EVO-9-MR

iTrader: (2)

this is the correct orientation right?

DJ Brett B

iTrader: (12)

^ yes

boostedwrx

iTrader: (27)

Maybe run a new 1/4" vacuum line from the bov to the intake manifold, bypassing the small 5/16 oem line. Just something to try.

DIDYSIS

iTrader: (18)

They are going to flutter a little, I kinda like it, but if you are trying to hold boost and they do it sucks, You can always get an aftermarket one, but really the Stock BOV, is great. I have had about 6 Bov's, stock one has about 11,000 miles, Greddy Type S Great sounds great mostly more flutter, HKS works great, sounds good, FRL, little crazy, does not hold well at boost, just had it for the sounds and weekend entertainment, I cant remember some of the others, but right now I use the Tial Q and I will not and can not complain at all about it. I love this BOV, and wish I would have got one right off the bat. Sounds good, holds boost, works great for light throttle, full throttle, no flutter at highway going up hills. never a problem at all. I am the happiest with this BOV and I will say it, THAT TIAL BOV IS THE BEST

DIDYSIS

iTrader: (18)

Also I heard upgrading the intake pipe can make them flutter a little more.