My 1993 Grand Cherokee is leaking fuel where the fuel pressure regulator fits into the fuel rail. I have replaced the regulator and it still spews fuel out when the switch is on. I have replaced the bolt holding the regulator in and the new part had new o-rings. Am I missing something painfully obvious?

I replaced mine , and theres an o ring in there . perhaps you didnt see the old one ?? and installed another with the replacement??