Is it possible to replace the fuel regulator on my 93 without removing the fuel rail? Thanks in advance for the advice

 

I spose it is possible, but may not be worth the loss of skin to do. It is no big deal to pull the fuel rail(s). Two bolts each side after removing the covers, gently pull up on each side (use a long bladed screw driver if they are reluctant, but it still doesn't take that much pulling pressure), and the entire assembly (both sides) will lift off together. leave the sides in one assembly, and simply install the regulator. If the injector o-rings are old or damaged, get an extra set from your local dealer, or you may find them at Ace hardware. It isn't that big of a job. (Don't forget to drain the fuel system first!)