LT1 LOW FUEL PRESSURE

John_Calabrese at ENGELHARD.COM John_Calabrese at ENGELHARD.COM
Tue Oct 19 19:02:51 GMT 1999



Luke,
Disconnect the inlet fuel line from the injection rails, cycle the pump.  If
fuel flows out, run the pump for 30 seconds, or until you fill a gallon jug with
gas.  That is you gph flow of the pump. It should take more than 45 sec to 1
minute to fill the gallon jug.  If it doesn't, bye bye pump or there is a
restriction in the line or sock.  If it does flow enough at that point, then you
need to make sure the regualator isn't bad, if you cut off the return line (dead
end fuel flow) and the pressure doesn't come up, bye bye pump.  If the fuel flow
is low and the pressure comes up when dead ended, there is probably a
restriction in the lines.  Are you checking the fuel pressure using the schrader
valve on the rail?





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