Clutch pedal won't return

Hi! I have a 2005 350z that I drive daily. I replaced the clutch with an OEM clutch, and it was driving with no problems for about three days. Then I noticed that the clutch pedal would stick a little bit at about 3/4 the way up. Then, it completely stopped returning at all. I have no idea why, any help?

Likely a slave cylinder issue. May just have air in it or the slave failed. Did you not replace it when you did the clutch? If the slave failed you're in to pull that trans again.

Personally anytime I'd ever do a clutch on a vehicle with an internal CSC I'd change the CSC at the same time. I just did it on my Lancer last summer.