Slightly jerks @2000 rpms with Rotrex and MAF-Cal!

[R-12914]

Hi,

I have a question which reads as follows:

I currently have the MAF calibration on my ECU.
I noticed at about 2000 rpms when I push the throttle more or less strongly (independent of which gear is in), or if I at about 2000 rpms the accelerator then kick too sudden, the car jerks slightly, as if I had minimal misfires.
This is only at round about 2000 rpms, not at less or higher rpms!

If the engine has more temperature, this phenomenon is somewhat less strong, but still present.
What could it be your opinion, how can I find out to what it is or how can I fix it?


Thank you so much for your reply and regards,
Matthias

[Spunkster]

Has the is vehicle been properly tuned on the dyno? Have you discussed this with your tuner?

[R-12914]

The Engine/Car was tuned on the street by Vit.

BTW: The throttle body is before the supercharger!