1.5 yrs post op of Facelift, will the nerves still repair themselves?

It seems that what you are describing is a pulling sensation from tightness only.  That should resolve over time in that all facelifts will eventually relax.  A true nerve injury would be either paralysis of one or more facial muscles (such as inability to raise an eyebrow or complete a full smile) or permanent numbness to an area.  If you do not have one of those problems, then just give it time.  Maybe a visit to your plastic surgeon to see if there is something he can do to relieve the sensation.  A picture of you would be more helpful to give you a better answer.

I'm not sure what you're experiencing but tightness 1 1/2 years after a facelift is decidedly uncommon. I wonder if the plastic surgeon used any foreign material in the facelift.

Nerve injuries can occur with facelifts and/or neck lifts. The two most common nerve injuries include the "great auricular nerve," which can result in permanent numbness around the ears and facial nerve injury that can result in changes in the smile and facial movement. Great auricular injury is common and will not cause individuals any long-term disability. However, facial nerve injuries can be potentially devastating if the entire or part of the face stops moving. Individuals who have "extreme pulling" may be experiencing an after effect of facial nerve injury which is called "synkinesis." Without examining you it is very difficult to know exactly why you are having extreme pulling. I would recommend seeing a facial plastic surgeon with expertise in facial nerve as a second opinion.