89 wrangler

Replaced everything imaginable. Finally narrowed it down to fuel pressure regulator. So.says mechanic. How do I change it? Can't find an instructable. Any help appreciated. Thanks in advance.

I just got an 89 wrangler with a 6 cylinder. It has a weber on it but I have the stock carb and air filter assembly. I think I need to have the weber rebuilt and am debating going back to stock. This is my wife's daily driver and sometimes off road but not a ton. Thanks for your thoughts.