Can my mspnp control water/meth?
 

It sure as hell better!! I had no doubt that it could ever since day one. Mainly because of the window that says "water injection settings". But after searching for sometime now for the proper wires to use, all i found was a post from a vendor of DIYauto that told me the mspnp was not setup for it.
I think i've clearly missed something here. Didn't find the right thread, misunderstood a particular statement, something.

It can, but you need to build a small circuit for it. Drawings/pics in my build thread.

What MSPNP variant do you have? I'm guessing this is a Gen 1 (white box). The firmware does have a water injection control option, but the hardware to use it is not present. As Hornetball notes, it is possible to add this.

Understood.