Unfortunately it seems that one of two things is very wrong, possibly both.
First: there's got to be a problem with your plumbing, somewhere. But it's beyond me--I can handle the simple stuff and I always keep it simple.
Second: You may have a wiring problem, possibly trying to run a 220v pump at 110v or something more subtle.

I doubt it's the pump/motor itself. Not sure what, if any, guidance I can give you. You'll have to rely on Mark for that.