brera 2.4 jtdm unusual sound from the turbine [file included]

[sighline]

I.. by removing the dpf... I started to hear a slight whistle in the starting.. (not the minimum), we say from 1000 to 1500 rpm..
then when I put the flange to the egr noise and increased...
from the way you describe the noise (near the cockpit) would seem to be the egr or intake manifold spouting... (I've heard the audio.. but you don't know where it comes from)
I have already read in the internet.. people with prisoners of egr sfilettati... and vents in that area... even a friend of mine.. and found the inlet manifold "melted" i.e. it was cracked... it's talking about the plastic version but'..

yes , this to me is doing it , sibillo of the turbo to the starting point in that range of rpm that you have indicated you , then when it goes up to 0.4 bar this sibillo disappears
it is then to minimize this sibillo remains perceptible , that is, you feel it without touching the gas and yet, as I have already said before the sound goes up and down as if the arivasse air periods to the turbine.. as if I tocassi the accelerator by increasing the rpm of the engine.. then the vanes of the turbo around more and then less .. and the fact that I don't touch anything ..
In the audio that I left at the first post you know very well how to change the frequency of the sound to a minimum without reason ..
Perhaps you are rodando the turbo ? has less than 200 km of life and the respect and' new neck receipt ~1350 euro warranty garett , I have all the bills so it's all official .. I don't think that the mechanic has given me a turbo regenerated facendomela pay as if it were new to pat

I see that you also have the brera 2.4 , I wanted to ask if you the arrow on the gauge makes the shots .. I x example by accelerating the plan in the third climb, the pressure rises to 1.3 bar with the throttle to 40% and then I go to 0.8 bar, and I hear a click . as if I had turned off and rejoin the engine .. then it loses all power, and then resume it .. and everything is done in a half a second .. it is bit annoying that shot .. could it be the pressure sensor ? with the dpf attacked me this joke

And then exceeding 3500 rpm the pressure drops from 1.5 to 1.2 and no more .. And it is here that he begins to lose air pressure
Can you describe the behavior of your turbine? as the pressure in 2500 , 3000 , 3500 , 4000, 4500, 5000 laps ? on the test bench my fa 220 hp and 520 nm at 2900 rpm and then drops bad once exceeded the 3000 rpm and all this with an incredible smoke; hence it the same map on a spider does get to 246 hp with the same pair
and then the horses exploits them after 3500 rpm .. not cm my after 3000 rpm it loses all power

[cicciocar]

according to me ... this whistle that you hear ? normal... my golf 4 gti 150cv he began to do after that I deleted the egr...

[blackwolf76]

I happened to some of the car with studs exhaust manifold broken and cars with studs egr sfilettati, as shown above. I would check these two things, and then maybe check the turbine.

PS: the plastic manifolds usually melt where air enters the egr, especially if the car works a lot at low speeds.

[david]

I have a 159 1.9 q tronic..
according to me... do you have any tube cracked.. that goes to the pump.. or even to the geometry...
otherwise.. could it be that you are the type of valve with 2 tubes that makes work the turbo.. (I know that I explained bad..)
practically.. if you take away the hoist covers.. you have the pump.. that makes work the brake booster...
always from that pump.. a tube of black... it will be 4 or 5 mm that goes to the pieburg (when you open the hood.. you see.. it is a kind of valve, black) maybe it is just him..
to try... off the tube with a black.. that goes to the turbo... (so the geometry should be completely at rest.. and not blow the whistle) I would not like to be spoiled and go air into depression.. even when I should not.. and still does work evil in the geometry.. giving you those defects (the shot)
I hope you figure out what piece I speak.. even if I attach the pictures.. you are not allowed to see it (for now)
and he's the one who manages the geometry...

however to me... the turbine.. from the peak (e.g.: 1.6 and then decreases and stabilizes at the bottom... it's normal... the shot.. no)
about the smoke.. and power.. everything is on the map... and every car reacts differently.. to the loaded map.. you can expect the same changes give the same results..
the black smoke.. can depend on.. too much fuel.. or the little air... (see if you can really solve the management of the turbo) and then see..
if you upload the map on the forum.. you can say.. if the map is good... or if she is the cause of the smoke...
another thing... since you just changed the turbo... and on the jtdm and really hard to break them.. (mine has all the active 130.000 km) can be really a problem of the map that you caused the break-up...

do the test of the pieburg.. and see if systems the whistle.... change the part to you if you and him... and made to look at the map here on the forum... and you will see that solve everything..

[sighline]

Hi david, just watch : I found the piece that you mean .. I have disconnected the hose that goes to the intake manifold , almost one in depression ( sucks air from the tube) I pulled the engine to access and immediately disappeared the sibillo ( the one that changed the frequency ) and immediately started a sound hmmm... how do I explain .. type v8 gas naturally aspirated .. roar despicable ( the same thing happened when I was with the sensor prex detached) .. The car has no more than 50 hp.. not to be in recovery ( with the sensor prex detached went into recovery and did not whistle, nothing .. the turbine rises to 0.3 bar to 4000 rpm .. , 0 smoke
Now the turbo goes without geometry .. blow the whistle does not make it more xke' don't pressure .. What have we solved ? you say you change the converter pressure (pieburg)?
I noticed the presence of oil on the intake manifold ... side egr .. me and it seemed very clean and warm .. then cool , without fulligine and dust ..
Now I try to disconnect quel another tube that goes to the turbo .. and see what happens..however I don't think that changes anything since they are connected on the inside of the converter

bhe' watch.. I sucked air with the mouth of the tube that goes to the turbo and I was sibillare .. then when rilasciavo the air turning off when scrolling the geometry .. so I would say that the pipes are not creppati .. could be just the drive itself back on the pressure .. ( my guess)

I'll give you another question.. But if the geometry should be checked through that tube.. what the wastegate..? only to throw the air that is not needed ( release throttle after a tirade with the following 'tiutiutiu'?) My mechanic told me that the geometry is controlled by the wastegate valve.. wrong qlcosa?

[david]

you have found the culprit of it all..!!
both stroke and at the time of release.. that whistle to a minimum.. you have to change that black piece with the tubes (I don't know the exact name) but I think it's called pieburg.. and you will see that solve both to a minimum... and run... it should be around 60 euros... !!
regarding the components of the turbo.. I don't know to explain it... wait that meets someone on the forum.... and I repeat... I advise you to view the map here on the forum.. (for the ecessivo smoke)

[msport (exil77grande)]

but the machine is also remapped next to have the dpf off and the egr off?

[sighline]

you have found the culprit of it all..!!
both stroke and at the time of release.. that whistle to a minimum.. you have to change that black piece with the tubes (I don't know the exact name) but I think it's called pieburg.. and you will see that solve both to a minimum... and run... it should be around 60 euros... !!
regarding the components of the turbo.. I don't know to explain it... wait that meets someone on the forum.... and I repeat... I advise you to view the map here on the forum.. (for the ecessivo smoke)

Ok , then I as soon as the replacement of this converter... once changed to let you know

but the machine is also remapped next to have the dpf off and the egr off?

Hello msport, The machine currently has the map that makes smoking so much because it studied evil .. But with the map that I've sold you, then the original power + no egr no dpf , smokes the same , a little less... And maybe' that in order to understand the origin of the whistle I put the map pull ... more horses put more whistles .. so I make less effort to locate the place from which blows..

[sighline]

you have found the culprit of it all..!!
both stroke and at the time of release.. that whistle to a minimum.. you have to change that black piece with the tubes (I don't know the exact name) but I think it's called pieburg.. and you will see that solve both to a minimum... and run... it should be around 60 euros... !!
regarding the components of the turbo.. I don't know to explain it... wait that meets someone on the forum.... and I repeat... I advise you to view the map here on the forum.. (for the ecessivo smoke)

Does the shot in the release .. At the time of release of the accelerator feels the effect of the valve blow off that throws out air that is not needed any more , and The stroke is in acceleration .. The pressure gauge rises to 1.2 then 1,3 1,4 then snaps to 0.8 ( hit) and then rises and remains fixed in 1.2, always with the throttle to 40% , while if the thrust of the whole not feel the shot ... salt 1.5 x then stay there until I don't pass the ~3000 rpm when it starts to whistle and lose the pressure going from 1.5 to 1.3 bar.

[rts]

That device ? a eletrovalvola that regulates the depression before you change it check the other tube ? one that brings the depression that is not cracked