[Gmecm] TBI Fuel problem

[DV Fagan]

Craig,
Why not move the lines inside the frame rail? 
Assuming you have them.  The fuel will stay cooler.
Dennis



--- Craig Smith <kc5aeq at earthlink.net> wrote:

> Darryl
> 
> I confirmed it today with an ir temp gun it appears
> the fuel is getting hot
> in the tank 120 F  and flashing of between the tank
> and the inlet of the
> fuel pump.  The heat is coming from the Exhaust
> manifold Thru the TBI (
> 4cyl engine both manifolds stacked on one side of
> the engine).
> Has anyone had experience with insulation tapes etc.
> to insulate between
> the manifolds?
> 
> Craig
> 
> 
> > [Original Message]
> > From: <dgilbert78 at juno.com>
> > To: <kc5aeq at earthlink.net>
> > Date: 8/12/2006 7:30:23 PM
> > Subject: Re: [Gmecm] TBI Fuel problem
> >
> > There you answered your question. The pump stopped
> working , or the pump
> > blew open a bypass valve, but no pressure when you
> dead headed it
> > apparently pump is not pumping or it went into a
> bypass mode
> > internally???
> > darryl..
> > On Sat, 12 Aug 2006 19:09:39 -0500 (GMT-05:00)
> Craig Smith
> > <kc5aeq at earthlink.net> writes:
> > > I have a guage inline at the discharge of the
> pump.  The pump is 
> > > capable of 45# I'm using the carter external
> pump that is designed 
> > > for TBI add ons its a rotary vane pump.  When
> the pressure droped I 
> > > pinched the return line off at the TBI pressure
> still stayed at near 
> > > zero.   I pulled the tank checked the pickup no
> strainer no 
> > > restriction. 
> > > 
> > > I wish there was enough room to run an in tank
> pump.  
> > > 
> > > 
> > > 
> > > -----Original Message-----
> > > >From: dgilbert78 at juno.com
> > > >Sent: Aug 12, 2006 6:32 PM
> > > >To: kc5aeq at earthlink.net
> > > >Subject: Re: [Gmecm] TBI Fuel problem
> > > >
> > > >Are you monitoring fuel pressure someplace with
> a pressure gauge 
> > > or
> > > >something?? the TBI system is pretty simple.
> You have a pump 
> > > pumping at
> > > >least 18lb pressure and enough volume for the
> injectors being used. 
> > > The
> > > >regulator is regulating fuel pressure at the
> injector inlet 
> > > typically 13
> > > >lbs. The overflow fuel free flows back to the
> tank. Possibly a 
> > > fuel
> > > >filter problem, possibly fuel supply starving
> from pluged fuel 
> > > pickup.
> > > >Check if pump can deliver the required volume
> at required pressure, 
> > > not
> > > >much left
> > > >good luck
> > > >Darryl...
> > > >On Sat, 12 Aug 2006 18:16:19 -0500 (GMT-05:00)
> Craig Smith
> > > ><kc5aeq at earthlink.net> writes:
> > > >> I pulled the cap and ran it same thing. 
> > > >> I'm wondering if the fuel is flashing off
> between the tank and 
> > > >> pump.
> > > >> 
> > > >>   
> > > >> 
> > > >> -----Original Message-----
> > > >> >From: dgilbert78 at juno.com
> > > >> >Sent: Aug 12, 2006 6:05 PM
> > > >> >To: kc5aeq at earthlink.net, gmecm at diy-efi.org
> > > >> >Subject: Re: [Gmecm] TBI Fuel problem
> > > >> >
> > > >> >Hello: Try the test with the fuel filler cap
> loose??
> > > >> >Darryl...
> > > >> >On Sat, 12 Aug 2006 17:37:10 -0500
> (GMT-05:00) Craig Smith
> > > >> ><kc5aeq at earthlink.net> writes:
> > > >> >> Everyone
> > > >> >> 
> > > >> >> I'm having a fuel pressure problem with a
> conversion we're 
> > > >> >> performing on my fathers MGB.  The fuel
> system is plumbed just 
> > > as 
> > > >> a 
> > > >> >> stock Chevy TBI system running at 16# With
> an external Carter 
> > > 
> > > >> fuel 
> > > >> >> pump mounted in the right hand battery box
> about three feet 
> > > from 
> > > >> the 
> > > >> >> tank.  The fuel return from the tbi is
> plumbed back to the 
> > > tank 
> > > >> >> dumping about an inch from the tank
> bottom. 
> > > >> >> 
> > > >> >> After running for about 5 miles I'm
> loosing fuel pressure.  It 
> > > 
> > > >> acts 
> > > >> >> like a vapor lock condition.  After it
> sits a few minutes it 
> > > >> cranks 
> > > >> >> and runs fine until it heats back up.  I
> figure I'm picking up 
> > > 
> > > >> heat 
> > > >> >> from the engine compartment.  Has anyone
> placed an aftermarket 
> > > 
> > > >> fuel 
> > > >> >> return regulator downstream of the pump
> returning to the tank 
> > > and 
> > > >> 
> > > >> >> blocked the return at the TBI?  Is the
> fuel return thru the 
> > > TBI 
> > > >> used 
> > > >> >> to cool the injectors, or does it have
> another purpose? 
> > > >> >> 
> > > >> >> Thanks
> > > >> >> Craig
> > > >> >> 
> > > >> >> 
> > > >> >>
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> > > >> >> 
> > > >> 
> > > >> 
> > > >> 
> > > >> 
> > > >> 
> > > 
> > > 
> > > 
> > > 
> > > 
> 
> 
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