Power drop

  Jul 5, 2020 #1  

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Stopro92

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Hi, Recently I noticed that my Audi has weakened, could anyone look at these logs? It seems to me that the turbocharger is charging too little and probably the ignition time is also not the best. The car is a3 8p 2.0 tfsi.
http://vaglogi.pl/log-003_020_033_c9lC6S.html
http://vaglogi.pl/log-002_115_118_ztd4l.html
http://vaglogi.pl/log-002_103_230_jeulp.html

 

  Jul 10, 2020 #2  

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ai_Ingo

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Hi, can you please give me the VIN?

 

  Jul 10, 2020 #3  

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Yes, no problem WAUZZZ8P65A159526

On the 4th page the last post is a scan of the whole car if it helps. Https://forums.ross-tech.com/showthread.php?23011-Clima-a3-8p/page4

 

Last edited: Jul 10, 2020

  Jul 10, 2020 #4  

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I think this is your problem. The membrane probably has a crack, so the boost pressure cannot build up properly. It is a diverter valve and only opens when the throttle valve is closed. It prevents the air column from braking or damaging the turbine. The air is bypassed the turbine. If there is now a small crack, a small part of the boost pressure is lost through the bypass under load. The valve is on your vehicle In the housing on the suction side of the turbocharger, you can reach it from below.

 

Last edited: Jul 10, 2020

  Jul 10, 2020 #5  

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The turbo is brand new together with the dv valve because the old one was cracked at the exhaust outlet.

The problem is that I want to give the car to the tuner for tuning but I see that it has losses in power so I would like to adjust the serial power before tuning.

 

Last edited: Jul 10, 2020

  Jul 10, 2020 #6  

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Hmmm ... ok. How about the engine ventilation, is it ok? I think it's called PCV. Is there a leak?

 

  Jul 10, 2020 #7  

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We also exchange it with the turbo

 

  Jul 11, 2020 #8  

Jack@European_Parts

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Is intake or exhaust with any FOD restrictions?

 

  Jul 12, 2020 #9  

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I do not think that FOD would take place, but I am also wondering that the maximum speed in this Audi is 210km / h and the blockade in the controller is set to 250km / h.

 

  Jul 14, 2020 #10  

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Maybe it is a damage or a leak in the boost pressure system,as Jack mentioned. If you remove the hose from the throttle valve, you can pressurize the system with an appropriate adapter. So towards the intercooler and turbocharger. be sure to use a pressure reducer. the maximum pressure should not exceed 0.5 bar. if there is a leak somewhere, you will be able to hear it.

 

  Jul 14, 2020 #11  

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I looked at the intake system and I don't see any leaks anywhere, it seems to me that the problem may be the engine driver, I have the impression that something was once done with it. And what do you think about these injection corrections from logs that I added? I think they are a bit too big?