tpi for an early jaguar

[Romans, Mark]

The factory vent lines for (at least on my car 74  XJ12L were very small.
They were at the gas cap fillers.  I would continue to use them as vents.
The charcoal canister was in the left front fender well, in front of the
wheel.
I just left it stock.
My XJ12L had fuel return lines stock, and I converted the car to a
carbureted
406 small block.  I changed the stock fuel pumps to in line AC Delco fuel
pumps
but left all the fuel switching hardware stock.
If I had converted it to Fuel Injection, I would have put high pressure AC
delco
fuel pumps in place of the stock pumps and left all else stock.
I would suggest that you check a wrecking yard for fuel return lines and
routing.
If you can't pull the fuel lines off a later car, at least if you take some
notes you
can see how jaguar routed the lines.
Good Luck, it should be a nice car.
What year is your car?
Mark
----- Original Message -----
From: "Diane Stowe" <DianeS at speakeasy.org>
To: <gmecm at diy-efi.org>
Sent: Friday, December 08, 2000 10:01 PM
Subject: Re: tpi for an early jaguar


> Thanks, I was going to run a new metal line to the rear, the same size as
> the return off the tpi. What size is that btw ? (I haven't had my tpi
> delivered yet), and then to a return line switch in the trunk, then to the
> appropriate tank in use via the port in the middle/top of the tank.
>
> however as I ponder the increased fuel turbulence in the tank, I can see
> where there would be more fumes created in each tank. I really would like
to
> have a proper vent line running to a charcoal canister, etc. like a real
car
> would.
> in fact I think I'll run a new vent line too, I am sure my old metal vent
> line underneath the car is totally and hopelessly plugged.
>
> I have to find and rip out all of the totally junk and absurd jaguar vent
> tubing in the trunk, it would give me great pleasure.
>
> I do think that there is a smaller second vent line at the top, perhaps
next
> to the fuel fillers ?, (all of my tanks are in the car, and the manuals
are
> not much help with this). even though this is hard work, it's got to be
> better than 3 fuel pumps and all of the other stock jaguar nonsense. I
> cannot imagine fixing newer jags, I saw a few at a salvage yard half torn
> apart, my '72 has 1/48 of the wiring.
>
> if anyone has any other ideas please let me know.
>
> thanks, Diane.
> ----- Original Message -----
> From: <Tedscj at aol.com>
> To: <gmecm at diy-efi.org>
> Sent: Friday, December 08, 2000 8:44 PM
> Subject: Re: tpi for an early jaguar
>
>
> > In a message dated 12/8/00 11:39:48 AM Eastern Standard Time,
> > romans at starstream.net writes:
> >
> > > DON'T use the vent lines for return!  They barely work as vents!
> > >  If you like driving a Molotov Cocktail go ahead.
> > >  I had problems just keeping the vent lines on as vents on my
> > >  74XJ12L!
> > >  Please figure something else out!  Like maybe pulling a set of
> > >  factory return lines of a later MY jag.
> > >  Mark
> >
> > I used the vent line going back to the trunk, but I bypassed the rest.
If
> > you use the vent line that goes to the rear of the car and then use NEW
> line
> > from there to the vents in the tanks (only a few feet), you will be
fine.
> > There is a second vent in the fuel fillers.  I believe these are the
ones
> > that run to the interior of the car and give you that gas smell (the
> British
> > are brilliant, aren't they!?!).
> > Sorry I wasn't more detailed the first time.
> > Ted
>
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