LT1 LOW FUEL PRESSURE

[Ken Kelly]

Luke,
	Just picked up on this thread. I'm putting an LT1 & 4L60E
in my 48 Ford. I have disassembled the 8051, and can help
you with some of your questions. Send me email to
pcmdoc at surfree.com

		Ken

Luke Joseph wrote:
> 
> I finally had a chance to check the fuel pressure and  start the car after
> fixing the hose in sending unit and she ran like a top.  It almost seems to
> good to be true.  It has been raining so I had very little traction but that
> LT1 feels a lot better than that old 305.  I still have a couple of dozen
> little things to do including the VSS/speedo.  I plan on doing a search on
> the archives for info but, can any one tell me how the ECM decides to shift
> gears and what, weight, gear ratios and tire size has to do with it.  Also
> since the tranny(4L60E) is digitally controlled is it possible to have a
> manually activated tranny from buttons on the steering wheel. Kind of a poor
> mans version of the system used on indy cars.
>         Thanks and if you have previously addressed these issues tell me a
> key title to search in the archives.
>                 Luke (85 Monte Carlo SS w/95 cop LT1-4L60E)
> 
> > -----Original Message-----
> > From: nacelp at jvlnet.com [SMTP:nacelp at jvlnet.com]
> > Sent: Wednesday, October 20, 1999 12:14 PM
> > To:   gmecm at efi332.eng.ohio-state.edu; 'gmecm at efi332.eng.ohio-state.edu'
> > Subject:      RE: LT1 LOW FUEL PRESSURE
> >
> > I've seen that in dribs, and drabs.  At one time we had a real problem
> > with
> > H2O, in the fuel around here, and then with high alky content, and during
> > both episodes, there were min, but many more soft hose "failures".  Carbs
> > weren't really effect, but several TBI's, and many more TPI's
> > Grumpy
> >   Also, good reason to replace as much else where as possible with AN,
> > specially around any ignition stuff.
> >   Matha Stewart going public!!!!!
> >   After her ignoring the Holiday Invitations from CSH, HQ for over a year
> > now, I'll be darned, to now extend the invitations again.
> >   What next Ralph Nader, and joan Claybrook, going public!!!!!!!!!!!
> >
> >
> > >I pulled the sending unit out last night and sure enough the hose
> > connecting
> > >the pump to the fuel line had split.  It was a real soft spongy type of
> > >hose.  My guess is that they purposely made these hoses to blow out first
> > in
> > >case of high pressure.  That way you have the fuel spill contained in the
> > >tank.  Anyway, I replaced it with some F.I. hose and some hose clamps.
> > The
> > >question now is, if there is a restriction in the supply/return large
> > enough
> > >to cause this or is it just a piece of crap hose to start with.  I think
> > I
> > >will do the flow test first in to a gas can on the supply side and maybe
> > do
> > >some thing similar on the return to check for any large restrictions.  By
> > >the way the return is 5/16 all the way back until it gets to the gas
> > tank,
> > >there it switches over to the 1/4 line, which is the return on the
> > sending
> > >unit.  Looks like many of you hit the nail right on the head THANKS FOR
> > THE
> > >HELP!
> > >                                     Luke
> > >> -----Original Message-----
> > >> From:      Shannen Durphey [SMTP:shannen at grolen.com]
> > >> Sent:      Tuesday, October 19, 1999 8:22 PM
> > >> To:        gmecm at efi332.eng.ohio-state.edu
> > >> Subject:   Re: LT1 LOW FUEL PRESSURE
> > >>
> > >> David A. Cooley wrote:
> > >> >
> > >>
> > >> Also, the isolator used on some systems is an oval shaped
> > >> > >piece of plastic that slips over the sender and pump.  It can leak
> > >> > >arounf the pump/isolator or isolator/sender union.  I found enough
> > of
> > >> > >these that every car equipped with one gets a new part if the pump's
> > >> > >replaced.
> > >> >
> > >> > With the problems the GN's had with the isolator, Every pump I
> > replaced
> > >> I
> > >> > threw the isolator away and replaced it with a short piece of FI hose
> > >> and 2
> > >> > metal clamps!
> > >> >
> > >> That's the best move.  Some people really notice the noise the pump
> > >> can make.  Amazing how someone who can't hear will complain about the
> > >> tiniest of squeaks and rattles.  Just drives a man nuts.
> > >> Shannen
> > >>
> > >> > ===========================================================
> > >> >             David Cooley N5XMT           Internet:
> > N5XMT at bellsouth.net
> > >> >       Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
> > >> >     Sponges grow in the ocean... Wonder how deep it would be if they
> > >> didn't?!
> > >> > ===========================================================
> > >