Less boost 2.0 tdi, no fault code

   #1  

tonyjgetb

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C?ID=292168
Hi guys đź‘‹.
I have a Audi A4 2011 (b8) 2.0 tdi quattro, and have problems with the boost.
My Audi have another software, and the turbo just to peak about 2.1 bar (215hp /original 170hp).
I haven’t put the throttle down for some time. But for about 2 weeks ago I notice, that my car only “charging” a peak on 1,7 bar.

I tried to record logos with the VCDS, but I did something wrong.
What I notice, was that the car get what it wants in boost.
What I also notice was that mass air sensor get about the double value of what the car calculated.
I don’t remember the value, but I think the calculated value was 300...something g/s, but it get over 600 g/s.

Car run great, but doesn’t have all the power.
Can a fault mass air sensor make the turbo have less boost, but don’t built a fault code?

Regards Tony
 
   #2  

Uwe

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Please post an Auto-Scan for context, so people can see exactly what ECU you have. Only then we can people advise what data you should be logging and what it actually means.

-Uwe-
 
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