View The Full Version : problem alfa 159,hiss from the engine compartment
Hi guys,I am writing for my 159
practically this is the problem,if I accelerate gradually in the second(where you note the problem) when the car arrives almost at the peak by one shot,after which the pressure drops and then gets up again.in that moment, you hear a noise type hiss of air, a frrrrrrrr
I then often hear the same hiss durable that I thought it depended on the wind, but probably not,I also tried to decelerate,accelerate,put in neutral, etc.. but I can not realize why sometimes does and sometimes not.
I thought of a hole in some sleeve or in the intercooler, but it does not smoke and does not lose the prestazionio,there is only the one shot when it goes to peak the turbine
ideas!!
these cars have problems on the studs of the exhaust manifold that come loose and sometimes they break causing noises similar to yours, check.
Already changed in advance last year and it was still
check the metal collar between the turbo and the catalyst sometimes I found it a bit unscrewed, you will find dust black close to the sheet metal heat shield to the turbo?
then,I am set to do some tests and the noise is randomly depends on a guard broken
but what you hear when the turbo goes into pressure safe no
lately, I have deleted the precatalizzatore with a pipe, and then I close the clamp,the problem is that the defect did already before
the most worrying thing is that it gives me this pressure peak,then drops and then goes back, it seems to me so normal, so much so that is also annoying
by increasing the pressure of the turbo of course, it also feels more
I thought I'd lower a little the curves of the vgt so as to keep the geometry a little more open, and then not have the piccata strange because I remember that from my review of the software 138-889 the one after there was a difference in the management of the geometry
I will try in the next few days and I'll know
also my gives the piccata and the VS 160-252 with or without swirl is the same thing I thought that they were their that open of a bang due to dirt and no or it is a strategy related to them make up the pressure x increase of the turbulence with the swirl closed in x then open
then piccate make your,mmm, and then you have not tried to resolve?
to long according to me some problem it would create
No Xké many people have all this let's call it a defect, I have removed the swirl x to avoid damage to the engine but were still working
Anyway, it is only at partial loads, the tablet does not
Anyway, to me it does and it also does it to several of my friends have the usual engine.
In practice, by the gas, and you can feel kick in **** a little less than 3000 rpm and note the pressure drop and then increase again.
I noticed but with a form if I press at the bottom does not happen......I don't know give me explanation
then,I lowered the 5% of the map geometry(vgt) and the problem is significantly lowered,having opened the palette of the geometry of the turbine definitely thanks and the car is less annoying to drive,more progressive,and certainly I have had a small decline but I can also afford to raise a little more pressure since it's not in the film as the first but much more stable
Have you lowered on the whole map or only at partial loads?
to try I lowered across the whole map,the peak remains but is less annoying,probably still lowering it a bit would be even less, but then it would be too open and faticherebbe as well to go in the pressure
Spring in the wastegate that flickers �,
This explains why the pressure is unstable. I had the same problem on a subaru impreza reprogram very little. I solved it by adjusting the spring preload
Spring in the wastegate that flickers ������,
This explains why the pressure is unstable. I had the same problem on a subaru impreza reprogram very little. I solved it by adjusting the spring preload
it is a problem on many of the 159, I don't think is at all a problem with the wastegate gives a piccata with no pair x, then lower the pressure and rise of torque
considering that this is a very fair response
considering that this is a very fair response
Hello all, I am new to this forum and I'm owner of an Alfa Romeo 2.4 JTDM with 200 hp. I am writing because I too had a similar problem as the drive, particularly during the period of scorching hot weather, she started to give me a series of problems rather obnoxious. As the first skirmish has begun, despite the turbo was pressure, not to have compression, then the pressure of the turbo has started to vary between maximum and minimum peaks a few times also seghettando without providing power to the motor, and only after you have turned on the malfunction indicator light engine eliminating almost completely the efficiency of the turbocharger. I did replace the DPF with a pipe removal, close with flanges l egr and reprogrammed the ecu; in the course of the operation was to clean the throttle body, the egr valve itself and the first part of the inlet conduit that were in very bad conditions. Now the car goes better but it is still at the top because I think it needed a more thorough cleaning of the suction and, as it says in the mechanic of the "geometry" of the turbo ( which failed to explain the mode in a comprehensive way, or rather clear). The power of the machine is good, if the high gears, it asks for power, the turbine has some seghettamento, the power consumption is not changed at an all time high in the city and parks on the highway ( with 80 euro of diesel I have travelled 980 km at a constant speed of 130/140 km / h) and then better than before I would say; I keep hearing the so-called "whistle" similar to the breath of the cheetah (who has always done since the purchase of 2,000 km and it now has 62.000) but the mechanic claims that from his inspection of the swirl is not damaged. You recommended something else? Thanks and sorry if I have bored. Good day to all
the swirl without removing the manifold so you can see if they move or not. before removing the dpf errors found?
In addition to the ones described above no other. Now I have to admit that the car goes very well, the only thing is that it remains audible that "breath" by the cheetah, but has no issues. Recommended to disassemble however the intake manifold? Is there any "symptom" or particular abnormality that may mostarare the vehicle in the presence of breakage of the swirl? Thanks.
I have months that I'm coming down with this problem. I have tried everything....with the map ori does the same with the swirl off and on, nothing changes, lowering the vgt attenuates but does not eliminate with pierburg new idem....the problem is not the sensors or the map, or electronics in general, simply log in that precise passing, and only with that workload does not maintain the pressure lens.pike over 1bar of what it should be. It is definitely a mechanical problem, and I think it's just the rod valve that is not working smooth. I have to throw it below and check. You have solved as?
errecinque some time ago I happened to disassemble a variable geometry of an alfa 159 150 hp but had performance issues and had the palette of the geometry in the part "fuse" in the closure position, did not touch even on top of each other...have you checked the geometry?I advise you to do so given their fragility.
On these machines often dirty or damage the vanes of the variable geometry, if you have a blower vacuum manual the colleagues at the westgate and pumping, you will see that the rod geometry is jerky or hangs for a moment on the point then snaps and continues the race sometimes happened to me that was just locked!
On these machines often dirty or damage the vanes of the variable geometry, if you have a blower vacuum manual the colleagues at the westgate and pumping, you will see that the rod geometry is jerky or hangs for a moment on the point then snaps and continues the race sometimes happened to me that was just locked!
Yes, I believe that my problem is the one that goes to the shots, gives this impression to the guide. I will check and if so that it gets? It is separate from the turbine itself, i.e. it is exchangeable only the part of the palette?
Errecinque in the 150 hp, the geometry is fixed on the exhaust manifold which is one piece with the hot part of the turbo, I split the turbo from the geometry and put in the tub to dry a whole night. you can remove the geometry from the manifold, but have those annoying torx screws that you will be settled now, in fact ever managed to unscrew them without breaking them. anyway with a cleaning I have ever solved without changing anything.
Hello overbooster maybe errecinque is as lucky as I was that I managed to change it with no problems and although the geometry was fully "cooked" the screws have not given any problem to svitarsi... you sell the replacement kit of the geometry
Hello Joseph, I hope for him... but if the blades are intact, and after cleaning they flow well and close perfectly, you can mount it without problems.
you have to see in what condition are the blades sometimes are really destroyed and also clean "stumble" and at times, just clean them well and are like new, you just have to somtare and see!
however, to me it never happened that would break them, we want the keys to good oovviamente, or if they are hard the unscrew easily with a screwdriver, percussion, or with a couple of hammer blows on the wrench inserted in the bolt and see that you unscrew!
Thank you for the info raga....mine is the 2.4 200cv I think the mountains are a KKK, but anyway I understand. So far the only turbine that I have disassembled, and the many are only those of my R5 and not to remove the fixed part on the discharge to the splitting just like in the picture by removing a snap ring that joined the party cold from the hot. I will be a little bit of evil to the neck had to do on the cavaletti, but so I will remember the good old days. I will let you know . Thanks again
have you tried to see that the seals of the egr if they are intact?
Powered by vBulletin® Version 4.2.2 Copyright © 2025 vBulletin Solutions, Inc. All rights reserved.