I have a D800....how do I get 4fps?

Of those settings, only CH and shutter speed are really important.

To get 4 fps (or 5 in DX mode), automatic focus should work. VR can be on. M or A or about any other mode should work.

I would guess that you have some peculiar setting somewhere that slipped in the wrong position, but I have no idea what it could be.

You could try setting a1 and a2 to release, and see if that changes anything. It might in some circumstances. Of course, if you are sure you use Manual focus it should not matter.

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