Hi everybody!

My problem is simple:
The air flow measured by the MAF suddenly drops for a second or two and eventually makes the engine die.

The MAF is not faulty (replaced with a new one and readings are consistent with the engine behavior).
The throttle body is not faulty (replaced with another one and position readings are consistent with engine behavior).

Thus, what is before the MAF and could make the airflow suddenly drop? Filter is clean.