Sorry seems to me all the threads that contain video have them deleted, I just did my Hallman MBC install according to : http://www.jonesland.com/evo/MBC_install.htm and now it sounds like fluttering or chattering, ONLY when i let off the throttle, it boosts fine, holds fine (minus taper from plastic BOV) buut as soon as I let off the throttle it chatters/flutters, and it kinda worries me. is this normal or should I go back to stock BC and wait?

 

did you losen the spring on the bov? What Bov is it?

 

stock evo8 BOV, only thing done is the hallman MBC (to cause new issue)

 

is all your lines correct? (Tubing)

 

went over it again, only possible issue I can think of is the t-fitting being too small, but its still snug and clamped, will check again in the light, and it holds fine, so that rules out WG right? and since its only when I let out of boost?

 

pretty sure its your bov not the wg. i have wg flutter and can post a video of it if you want to see the difference.

what bov are you running? spring is too tight, or there is a leak in your vac system. maybe even leak at intercooler piping. check for boost leaks

 

Doom leak test after work, stock bov with over 100k on it.... Think the bov just died, or leak more likely?

 

Here is a vid of the sound


<iframe width="640" height="510" src="http://www.youtube.com/embed/Nq4hlTw2TzI" frameborder="0" allowfullscreen></iframe>


any ideas this morning while im working?

http://youtu.be/Nq4hlTw2TzI

 

that is the bov....i had a similar problem when the adjustment nut/spring fell out of my MBC

 

Most likely the wimpy stock, plastic DV. Switch to the metal MR DV. Where are you referencing boost to the MBC from, the IM/DV line, or the compressor J pipe?

 

The bov/dv line, the link in the first post is exactly how I did it. where should the reading come from?

 

Such a stupid mistake. Had a pinched hose off the t from the bov.... Fixed flows fine. Thank you guys for your help you are all amazing!