LT1 LOW FUEL PRESSURE

[Mike Rolica]

Yep me too on the dyno, he he he   (doh!)
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	DC Smith [SMTP:morepoweral at tetranet.net]
	Sent:	Tuesday, October 19, 1999 5:28 PM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: LT1 LOW FUEL PRESSURE

	Somene else mentioned it, but you need to check the polarity of the
	wiring on the pump. It is a DC motor and will run backwards if wired
	improperly. Just thought I'd toss it out again, since it seems to
have
	been overlooked. I have wired a fuel pump backwards myself, so I
know
	it's possible. :)

	Luke Joseph wrote:
	> 
	> 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?
	> >

	-- 
	
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	Dan Smith      84 Regal   11.841 at 115.09     GSCA# 1459
	St.Charles, Missouri 
	mailto:morepoweral at tetranet.net               
	http://www.tetranet.net/users/morepoweral
	
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