Hi Catcher...

Wondering if the toilet ever flushed good over the last couple days? If it did, then it could be that the new pump was placed in a poor relationship to the inlet piping from the basement bathroom and toilet paper got hung up on the pump and at the discharge pipe and is stopping the toilet from flushing properly...?

If you reun the sink/shower for a span of time, can you hear the pump kick in and pump the waste water away?

Back to you...

MARK