[globa1950]

Can anyone tell me what is that named?

[Hudson River Steve]

Looks like a PCV valve. Positive Crankcase Ventilation valve. You should be able to pick one up at any auto parts store.

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[globa1950]

HELPFUL INFO THANK YOU.
I WAS WONDERING IF YOU CAN KNOW ANYTHING ON THROTTLE BODY FOR MAG 502 MPI
HERE IS THE QUESTION WITH LINK TO VIDEO DESCRIPTION
1999 MARIAH z222 throttle body position on Merc 502 MAG MPI

[Hudson River Steve]

The operation in the video is correct. It is a progressive throttle which gives you better response at low load and then max air flow at high load. I would recommend you don't mess with it unless you remap your ECU.

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