AGR System Decommissioning: Experiences?

I have blocked the AGR (Abgasrückführung) valve on my car. The car now runs better, the turbocharger spools up sooner, and the turbo lag is gone.

However, at 1500 RPM, when accelerating with full load, an unpleasant rumbling noise occurs.

Who knows the cause / solution?

wrinkledog wrote:

I have closed the EGR valve on my car.

I'm not familiar with the MKB designation - which engine (in which car) are you referring to?

Hello Ulf,

The AZV is a 136 hp engine in the Touran, essentially the predecessor to the BKD with 140 hp.

I'm thrilled with the vehicle and the engine; it's incredibly fast.
However, it likely suffers from the same deficiency that all TDI engines have:
Clogging of the intake tract due to EGR and CCV systems.

I'm sure that the throttle valve (which is probably adjustable) influences the knocking sound.

By the way:
I'm new here, but I've been following the forum as a guest for over 3 months.
I just registered today because I'm very impressed with the way people here discuss things in a solution-oriented manner.

If I can contribute in any way, I'd be happy to share my experiences.

Best regards,

wrinkledog wrote:

The AZV is the 136 hp engine in the Touran, essentially the predecessor to the BKD with 140 hp.

*unfollow* because I don't have any practical experience with the new 4-valve TDIs...