I have reached the FX limit and have already taken out all the unneeded fx from zombiemode and dlc3 but still hitting the limit. if someone could help that would be good

Make sure your recompiling the map, not just "building mod"

some of the csvs are compiled separately to the build mod tab, so until you recompile there will be no change

you can edit :

dlc3.csv
zombiemode.csv
nazi_zombie_factory.csv

just to name a few, I believe there are 6 in total that are compiled into out mods, i forget the others

http://ugx-mods.com/forum/index.php/topic,5311.0.html

I have already followed this tut

I have already followed this tut

I have not been able to reach the fx limit since I do things the tut way. I have added 50+ custom weapons, if you include upgrades. And many, many custom fx. You are either not following something correctly, OR, you have another issue, but it is saying 400 fx error. Those are tough. Try removing what you did last, say if you added a weapon, and see if you can stop the error.