I own a 2001 Blazer 4.3lt 4 door 4 wheel drive. I was having a hard starting problem it would take several attempts to start before it would run. On a few occasions it would back fire through the intake manifold. Researching pointed to the fuel pressure regulator. Put fuel pressure gauge on key on engine off got 55 to 60 psi it would drop to 48 or so. Changed fuel regulator (inside intake manifold) Inside the manifold it was pretty carbonized except under the regulator so I thought this was most probably the problem. When everything was back together I had no fuel pressure. Even though I could hear the fuel pump with the key on. I thought since the pump was on the old side maybe I could hear it but it wasn't pumping. I dropped the tank and changed the pump and fuel filter. Put pressure gauge back on and no pressure (0psi). I can hear the relay click and the pump. What did I overlook

  • Are you still experiencing this issue? – DucatiKiller Jan 5 '16 at 5:19
  • I'd check to make sure that you put the regulator back on the right way around. Also double check any hose connections. Then try metering the pressure before the regulator. – dlu Dec 20 '16 at 16:39

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