moktan_fdtt

My fd is making some weird noise, I can't figure out where it is comming from.
It's like a arcking/jittery nosie at a certain rpm, about 2500 or so. I am thinking it might be a vacuum line but I cant tell. I did replace on of the check valve comming from the pressure chamber on the top.
What is it?
thanks

littlemilla3

iTrader: (1)

Tell us more about it. Does it happen every time you reach 2500 rpm? At WOT only? Try to find out where it's coming from.

moktan_fdtt

Is it the pre spool actuator?

moktan_fdtt

like a whistling/broken vacumm line nosie. Comming from the turbo/airpump area.

KaiFD3S

iTrader: (37)

did you just change to open filters or put a downpipe?

speeddemon7

a lose pre spool actuator will rattle like crazy and also your primary boost will suffer.A whistling noise suggests a intercooler coupler may be torn.If the noise is coming from the air pump area my guess is that its the y-pipe coupler.Ive had this happen countless times.Which is why I just finished installing my efini y pipe today.No more coupler to worry about.

Tom93R1

iTrader: (2)

Is the pre-spool actuator the one on the y-pipe? I was wondering about that because mine seems loose, when I flick it with my finger it rattles quite a bit. I was looking at that because under boost I get this strange fluttering rattle sound coming from that area and it is pretty damn loud. At first I though it sounded like the turbos themselves having problems but they are way too new to be going out already, plus they boost much to nicely to be getting weak.

I was looking at it and doesnt seem there is a way to tighten anything up on it, iis that just something that needs to be replaced?
thanks

F0RSAKEN

I occasionally have a weird noise as well, but mine only occurs when the car is cold/er, and goes away after driving a bit. It sounds like buzzing, and it happens right around 2500-3000 rpm, and mainly on deceleration. Any ideas?