No performance at speeds below 1500 RPM

hello everyone,

On my Audi A4 B7 170hp, I have the problem that the car has absolutely no power up to 1500 rpm and barely accelerates.
From 1500 revolutions, power is applied, and at 2000 revolutions, full power is achieved.

Also, the problem is when I'm driving in 5th or 6th gear and the engine speed drops below 1500, then the car loses speed even though I'm pressing the accelerator pedal all the way down.


Error memory is empty.

what I have done so far: replaced turbocharger (the compressor wheel looked quite worn and the play was quite significant), cleaned AGR and throttle valve, temporarily blocked AGR (for testing purposes), replaced air mass sensor and air filter, re-adjusted the valve timing (the value is 0.35)

Low pressure on the turbocharger, the valve flaps in the intake manifold are also functioning.


Does anyone recognize this error, or does anyone know where it might be coming from?
what else should I check?

What's surprising to me is simply that the performance only drops below full power at around 1500 RPM.

Thank you in advance for your tips.

Inappropriate Chiptuning? 🙃

Chiptuning did not affect the car.

Turbocharger new?

Completely overhauled, the error was exactly the same before the change.

Is there a guide on how to proceed in case of performance issues, which is always available after logging in under x amounts?
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Maybe not always click away?

Error fixed, caused by the exhaust gas temperature sensor before the exhaust turbine, which was displaying a temperature of 1000 degrees.

Thank you for the feedback!

Was about a warning indicator in the cockpit? Because the charger would have been broken long ago...

The engine control unit reduces the amount of fuel injected when the exhaust temperature becomes too high. Therefore, the car must have generally lost power.

Best regards, Rainer