After reading this forum and others, decided to take a shot and replace Fuel Pressure Regulator on my 2000 Blazer 4.3. Got it all apart, besides very heavy carbon buildup, I was very surprised to find that nothing was connected to FPR!! I have owned blazer since 2003, last few years, hard to start, then progressively worse. What does this connect to? What could have happened? Any help appreciated!! I have pic, will try to post!

 

hey no worries its not supposed to connect to anything, just pull the clip off slide the old one out make sure the gasket is removed that goes on the back of the fpr, then slide in the new one with the gasket, throw the clip back on and put it back together.