Ok I was looking at the Planescape Races here on Planewalker (notice my comments on them in another thread that nobody is posting in 
) but anyway thats not important. What I am wondering is that if Modrons don't really feel much if any emotion. Do they feel pain? I mean Pain in a large part is emotional type respounce to an injury. I mean certainly its not all emotion like fear or anger but there are elements of those and other emotions in how we experience pain as human beings.
So if a modron (rouge or outcast of course) has a severly damaged leg can it simply make a logical conclusion that while the leg is damaged he is going to get more damaged if he doesn't try to use it and get away from comabt thus negating "pain" so to speak?
Then again I remember and will likely look it up at some later point in the Great Modron March adventure** warning minor spoiler**
a scientist/mage type crafting peices of biological enhancements out of modron parts and one of the things the party can do is end the "suffering" of these creatures and I think I remember them being in obvious pain but not being able to die because of the way the character has removed their body parts. Thus as long as they are alive their parts can be used by the character and they will not go back to Mechcanus like they normally would.
Any thoughts on this subject?
They do feel pain, and they can feel fear and agitation too (see The Great Modron March, page 36 and 37). They aren't as emotional as, say, archons, let alone the hyper-emotional eladrins and tanar'ri, but they're not constructs either. Modron emotions are likely more mechanical and utilitarian than those of other outsiders, operated via pipes and valves and installed for practical reasons. But they're personifications of a world-view that says that everything in the multiverse has its place in the cosmic order; everything is derived from the same basic principles of order. As practical demonstrations of what Primus thinks everyone should be, they need to be explanations of emotion. Modrons are capable of emotion (though that doesn't mean they experience emotions every day or even every year) in order to prove that emotions, too, can be lawful, that everything can be lawful and everything can be explained.