fuel pump pressure???

[Walter Sherwin]

That's not all that uncommon for the GMT400 trucks.  My 88 L03 did this, and
both my 90 & 91 L19's do/did this.  GM never quite had the baffling in the
tank figured out.  Their advice?......keep the tank above 1/4.  Actually,
that worked.

Walt.




----- Original Message -----
From: "Mike Martone" <mmartone at pop800.gsfc.nasa.gov>
To: <gmecm at diy-efi.org>
Sent: Thursday, December 21, 2000 1:03 PM
Subject: Re: fuel pump pressure???


> that would make sense if the tank was an after market or the pump was
> failing.. but... neither seems to be the case.. if the tank lost a
baffle..
> i'd most likely hear it....if the pump was going bad and had low
pressure..
> it would happen at any fuel level...and yeah, i've thought about the
sucking
> air thing but with 9 or 10 gallons of gas  i would think that isn't going
to
> make the tank that empty....
>
> anyway....maybe i should yank the level sensor and peek inside anyway..
who
> knows...can't hurt
>
> mike
>
> ----- Original Message -----
> From: Bruce Plecan <nacelp at bright.net>
> To: <gmecm at diy-efi.org>
> Sent: Thursday, December 21, 2000 2:26 PM
> Subject: Re: fuel pump pressure???
>
>
> >
> > Sounds like you running out of gas.
> > The fuel isn't baffled enough in the tank, maybe a baffle is broken
loose.
> > the instant the pump sucks air, the engine goes lame.
> > Bruce
> >
> >
> >
> > ----- Original Message -----
> > From: Mike Martone
> > To: gmecm at diy-efi.org
> > Sent: Thursday, December 21, 2000 2:08 PM
> > Subject: fuel pump pressure???
> >
> >
> > okay folks,
> >
> > I have an 88 C-10 305/TBI....when the gas tank gets below 1/4, RPMS drop
> way
> > down when accelerating from 0 to about 15 or 20....the vehicle has a 34
> gal.
> > tank and coolant temps seem to run somewhere between 150-170 ( according
> to
> > various thermostats that have been tried to get the operating temps up
to
> > around 185-190. again.. this only happens when the tank gets below
> 1/4full.
> >
> > anybody have a suggestion... by the way.. to my knowledge.. the prom
> hasn't
> > been screwed around with
> >
> > thanks in advance
> >
>
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