problem alfa 159,hiss from the engine compartment

[Ezechiele]

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

[overbooster]

the swirl without removing the manifold so you can see if they move or not. before removing the dpf errors found?

[Ezechiele]

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.

[Errecinque]

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?

[giuseppe89]

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.

[project]

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!

[Errecinque]

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?

[overbooster]

I hope you understand better that way

[overbooster]

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.

[giuseppe89]

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