Noisy ALH engine when acceleration

Hi!

I have a Golf mk4 ALH TDI and when i accelerate at high rpms from 2500- it's get noisy/loud and when it's stay that high rpm it's get normal sound. I think the fuel quantity maybe low. I log some measures with VCDS and the air pressure, quantity looks good. The iq is lower than the expected.The X values the time Y values the IQ actual and requested. What i need to check? Thanks for your help!

Give us a better description of noisy/loud.
Exhaust sound? Turbo sound? Engine sound? Clicking? Tapping? Barking?
Is there shaking of the motor? Do you feel a strong vibration? Can you feel it in the clutch? In the steering wheel..?

EDIT: Also, the following sentence makes no sense:
The X values the time Y values the IQ actual and requested.

STDOUBT said:

Give us a better description of noisy/loud.
Exhaust sound? Turbo sound? Engine sound? Clicking? Tapping? Barking?
Is there shaking of the motor? Do you feel a strong vibration? Can you feel it in the clutch? In the steering wheel..?
EDIT: Also, the following sentence makes no sense:
The X values the time Y values the IQ actual and requested.

Click to expand...

I see it as the X (horizontal axis) is time and the Y (vertical axis) is IQ, etc.