Low Fuel Pressure

I just installed a fuel pump from Autozone.  I worked fine for about four days, until today.  My 2000 Blazer will not start.  It has good spark and when I shot a bit of starter fluid into the throttle body, it cranked over for a sec.  I cheked the PSI, and it was about 38 psi.  I''m wondering if it is just a defective fuel pump, or might it be something else like the fule regulator? 

I hope you got the one with the lifetime warranty.....


Also it could be a voltage problem.  One could have worked loose in the last 4 days...Might wanna check voltage at the pump and or cash in that warranty before going after the FPR.

Another problems that I had when I put the fuel pump in was connecting the fuel lines to the pump.  I had to wait a few days after I had taken the pump off to re-intall the new one.  When putting back on the fuel lines, I had a question about the where the fuel lines went onto the pump.   The large one was obvious, but the other two smaller one were had to guess.  I put them back where they fell into place.  One was longer that the other, so I put it in the middle.  Like I said, it ran fine for four days.  Not sure if this might casue a low pressure reading.

Low pressure.  Sounds like a defective pump.  Does it hold this pressure once the pump shuts off?

Yes.  The pressure remains constant at 38 psi.