LT1 LOW FUEL PRESSURE

[Luke Joseph]

I did just that last night but for only a few seconds.  In the few seconds
that the pump was on upon turning the ignition key it did not even pump
enough fuel to get to my gas can.  Only a couple ounces was in my hose.
>From what you are saying the In a few seconds I should have a solid flow of
fuel that would give me about a cup or so of fuel.  I think I will pull my
sending unit tonight and look at things the list has suggested.  By the way
I am using 3/8's as the supply and I have heard that the 5/16 is restricted
to 1/4 somewhere, so it is alright to use 1/4 as return.    Thanks, 
	
Luke

> -----Original Message-----
> From:	John_Calabrese at ENGELHARD.COM [SMTP:John_Calabrese at ENGELHARD.COM]
> Sent:	Tuesday, October 19, 1999 3:03 PM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	RE: LT1 LOW FUEL PRESSURE
> 
> 
> 
> 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?
>