I've tried everything to make my pump from buildcraft work but it still doesn't. Any suggestions to help me please? I think maybe the problem is to allow access from buildcraft mod but still don't know
Did you set power on it? MJ, RF? Did you put a Fluid conduit on it? Did you make when pump is going down and it can interact with fluid? Post screenshot.
ok, i think i know what's wrong, place a chunkloader down and your liquid transport method on top, then surround it with either RF conduitsof some sort or redstone engines, power the redstone engines or send power through the RF conduits, that should work to get your lava out of the nether, but next time, just use an enderthermic pump