amego

cleaned the maf today it was black took the car out on boost i heard a whistle then changed gear heard a woosh no loss of boost cant figure it out

Scott STi V4

iTrader: (1)

Mine does the same.....dont have a clue why, still runs and boost's perfectly tho......

amego

cant be right thow must be somthing wrong cant be living with that

amego

Up

KAS35RSTI

iTrader: (73)

you got a filter on there? If not & you have standard intake, go back & check nothing is left open.

Rob Day

iTrader: (78)

Original DV stuck?

amego

All put back together as I took it off I'll check pipes tomoro can't understand if there's a boost leak why it's not lost power only removed the air filter box to clean maf 2 clips and a jubilee clip sound good thow but it's not rite

Rob Day

iTrader: (78)

As said the DV might be stuck shut.

amego

Yes but you wouldn't get a whistle on boost if the dv was stuck

Rob Day

iTrader: (78)

Yes if stuck open, and you would likely loose boost.

But if stuck shut, ie the spring wasnt budging then you wouldnt be dumping back into the intake, thus exhaust chudder, not a woooshh noise but a unusual noise.

Its only a shot in the dark though. I would take the car to someone on here whom is clued up to have a look for you.

Try another thread asking for help in the XYZ area.

Rob

Wonkey85

Might sound stupid but is the air box completely sealed shut. When I replaced my panel filter I didn't shut the box properly and I got the whoosh sound and no boost loss.

amego

all pipes seem ok the oe dv spring is very tight does go in but at a very hard press not sure how tight the spring should be

amego

did notice the h/n filter not sitting rite so put that right and the woosh and wistle aint as bad as before but i can still hear it but not as loud

joz8968

iTrader: (13)

I was at API on Fri and was looking at their tuning goodies on display. I picked up the Forge v.3/4 recirc DV and pushed against the piston. It took pretty much all the strength in a single thumb to overcome the spring and push it up.

So I reckon yours is normal then.... So long as it does actually move in/out smoothly, etc...?

amego

sounds about right then the dv so must be the airbox

53

iTrader: (41)

Have you trimmed the dimples off the the bottom of the filter? If you don't it will sit proud and not seal properly

Rob Day

iTrader: (78)

Sounds as though to me the OP had running issues and cleaned the maf, now has resulted in an odd noise.

So OP, what exactly did you do when cleaning the maf? Did you touch the intake other than the MAF, or any other parts at all.

53 is right about the dimples on the panel filter, but we dont know if you have even touched this?

Rob

amego

just removed the box cover and the pipe thats it nothing else touched and removed the fillter thats it cleaned the maf as the throttle responce was crap but now good i now ite strange iv checked everything the car has allways had a slite wistle but now abit louder and a woosh but as said its not as bad since i had a nose and put the filter straite ill have alook at the dimples after work in the week thanks for all your replys

Wonkey85

When mine was standard I got a turbo whistle and very slight whoosh when giving her some stick. But I could only hear this when the windows are done up. Your whistle is normal for a turbocharged car so ignore that. At what point do you get the whoosh? I.e normal driving or when giving it some stick?

amego

Mine ain't standerd ppp and remap get whoosh when changing gear on boost

joz8968

iTrader: (13)

Yeah, that's normal. It's working as it should.

amego

cant be normal never done it in the 3 years iv had the car the woosh i mean

Rob Day

iTrader: (78)

If the car/engine is running a standard tmic, OEM recirc dv, standard induction and all you have done to clean the maf is remove it, then im struggling to see how anything has changed. Is re the vac pipes to the dv fitted correctly, no cinks and is it attached to the manifold. Also is the 33mm outlet from the dv attahced correctly, and is this also plumbing back to the intake? If either of these are off I can see why you would be getting chatter, or the whoosh as air is not being recirculated, and is either being back filled through the turbo, or released vta and the intake return would not be returning correctly.

joz8968

iTrader: (13)

Sorry amego, I totally forgot you had an OEM recirc. FAIL.

But as above, it sounds like the DV itself is working properly.... EXCEPT.... that it sounds as though there's a loose connection at one end of the recirc hose, ergo air escaping to atmos, and hence a non-recirc-style whooshing noise.

amego

I'm stumped as well haven't had a chance to look at the car as I work away but will be looking this week still have a funny feeling it's got something to do with the air box as that's the only thing I removed

joz8968

iTrader: (13)

When you get to look at it, if you're not sure what you're looking for, post some close-up pics up of the items mentioned in this thread.

Hopefully... something will be blindingly obvious...

sparky113

iTrader: (2)

i may be missing the point here, but my bug eye wrx gets the whining/whistling sound when turbo spinning up and on boost. when your accelerating hard and change gear i get a slight whoosh.
i got a simota panel filter and standard dv. surely its just normal?
or is the said noise in the origional post alot louder than the one im thinking off?

joz8968

iTrader: (13)

sparky, the noises when on boost are invariably the cocophany of semi-muted induction roar (muffled by the airbox/MAF/intake trunking) + the turbo spinning up.

When you come off the throttle from hard boosting, you may possibly hear a slight muffled/muted whoosh as the recirc'd air goes back to the intake. But it won't be loud... if anything at all. (Assuming, of course, you do have the OEM recirc DV?).