I took my car to get it tunned several months ago. I was told I was burning lean. Could I just do my fuel pressure regulator and get a little more fuel into the mix or would that not change anything?

I was planning on doing the injectors later when I'm closer to finished with my project and knew which size I should get.

 

With out knowing what set-up you have or engine even, yes you can turn up your pressure as a small band-aid to cover you for a bit. Your on the right track look into injectors and tuning rather than crank up the fuel pressure.

 

Normally if you want to control fuel and make it stable...fuel pump, injectors and FPR