Are they solid elastomer or MCU style (a bit holey)
PACE will tell you what to do, since they supplied them or try Tim?
MCU loose their gases and that causes them to perform sluggish. They don't compress right and do rebound right. Which is pretty much any you see in the for sale section, even the ones classes as good are worn out.
Elastomer I think are a bit more robust but not as nice a spring. Used for all sorts though. Bushings, seals, wheels...
But I know yours are new and nowt to worry about.
What did the instructions say ?