<span class="highlight"></span>Prado<span class="highlight"></span> <span class="highlight"></span>120<span class="highlight"></span> <span class="highlight"></span>Series<span class="highlight"></span> <span class="highlight"></span>tanks<span class="highlight"></span>
Submitted: Monday, Mar 19, 2007 at 13:34
ThreadID:
43404
Views:
27511
Replies:
6
FollowUps:
2
This Thread has been Archived
Member - Cruiser (NSW)
Does anyone know if it is possible to select which tank you want to use on the 120 series Prado.»br />
»br />As I understand the system on this vehicle, if you have both tanks full, the system initially uses the 1st tank then automatically switches to the 2nd tank when the 1st tank is emptied.»br />
»br />This means that to use the fuel in the 2nd tank, you have to at first use the 90 litres in the 1st tank. That then means that you are faced with a fill of possibly 160 to 170 litres of fuel depending on how much of the 2nd tank you use.»br />
»br />My concern with this is that if you are constantly topping up with say 50, 60 or 70 litres at a time in order to avoid the hit in the back pocket, you never get to use the 90 litres sitting in the 2nd tank. »br />
»br />Is there a method of avoiding this situation that anyone knows of, as I have not found anything in the owners manual suggesting that you can select which tank to use. »br />
»br />Maybe there is an aftermarket kit or something that I dont know about or maybe someone with more knowledge might know if these tanks are cross connected, but somehow I dont think so. It doesnt appear to me that they are like the Patrols where the 2nd tank feeds into the 1st tank, because the guage appears to read of each tank seperately. »br />
»br />I have previously had an aux tank of diesel go bad in the tank and am paranoid about it happening again, so am willing to concider any options suggested.»div>div>
Reply By: Juzzy - Monday, Mar 19, 2007 at 14:13
Monday, Mar 19, 2007 at 14:13
I
recall
someone
on
this
site
stating
that
the
fuel
moves
from
the
auxilliary
tank
to
the
main
tank
via
a
venturi system
so
that
the
fuel
in
the
2nd
tank
is
topping
up
the
1st
tank
all
the
time
.»
br
/>
»
br
/>
I
am
not
100
%
on
this
,
but
do
some
searches
.»
div
>
div
>
AnswerID:
228317
Reply By: HGMonaro - Monday, Mar 19, 2007 at 15:44
Monday, Mar 19, 2007 at 15:44
yep
,
that
'
s
how
I
'
ve
read
it
works
,
so
you
'
re
really
using
the
2nd
tank
1st
!»
br
/>
»
br
/>
The
gauge
takes
a
little
bit
of
getting
used
to
,
once
it
gets
to
helf
way
*
it
flicks
back
to
full
again
and
the
"
90L
to
go
"
light
comes
on
(
and
acts
like
a
normal
fuel
gauge
)»
br
/>
»
br
/>
*
half
way
means
about
100L
,
not
90
in
my
experience
.»
div
>
div
>
AnswerID:
228345
Follow Up By: Juzzy - Monday, Mar 19, 2007 at 16:45
Monday, Mar 19, 2007 at 16:45
I
thought
the
first
tank
was
93L
and
the
second
tank
87L
.»
br
/>
»
br
/>
They
just
round
it
up
to
90L
each
:)»
div
>
div
>
FollowupID:
489122
Reply By: Member - Cruiser (NSW) - Monday, Mar 19, 2007 at 15:49
Monday, Mar 19, 2007 at 15:49
So
what
you
are
both
saying
is
that
there
is
no
chance
of
fuel
sitting
in
the
tank
going
bad
because
the
2nd
tank
drains
into
the
first
tank
. »
br
/>
»
br
/>
That
would
mean
that
when
you
fill
up
after
the
90L
to
go
light
comes
on
that
you
are
topping
up
both
tanks
.»
br
/>
»
br
/>
Do
I
have
that
correct
.»
div
>
div
>
AnswerID:
228347
Follow Up By: George_M - Monday, Mar 19, 2007 at 16:30
Monday, Mar 19, 2007 at 16:30
Yup
.»
br
/>
»
br
/>
That
is
correct
.»
br
/>
»
br
/>
George_M
»
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FollowupID:
489118
Reply By: Member - Cruiser (NSW) - Monday, Mar 19, 2007 at 16:38
Monday, Mar 19, 2007 at 16:38
Thank
you
for
the
answers
.»
br
/>
»
br
/>
That
has
taken
a
bit
of
a
weight
off
my
shoulders
.»
br
/>
»
br
/>
I
envisaged
having
to
use
170
litres
to
use
the
fuel
up
and
then
having
to
find
$
230
to
fill
it
all
again
.»
br
/>
»
br
/>
Good
stuff
»
div
>
div
>
AnswerID:
228358
Reply By: Member - Stephen M (NSW) - Monday, Mar 19, 2007 at 17:12
Monday, Mar 19, 2007 at 17:12
Thats
totally
different
to
the
90
series
.
With
the
90
series
even
when
running
on
main
tank
when
you
first
turn
ignition
on
the
green
light
on
the
reserve
tank
lights
up
,
once
started
it
flicks
back
over
to
main
BUT
every
now
and
then
it
transfers
from
the
main
to
the
reserve
tank
whilst
running
off
main
tank
.
I
did
notice
this
last
week
that
when
I
first
got
the
vehicle
the
reserve
was
on
half
and
I
was
running
off
it
.
I
whacked
$
50
in
the
main
and
switched
over
to
main
but
by
the
end
of
the
week
the
reserve
was
nearly
full
.
Read
the
service
books
and
this
is
normal
for
this
procedure
to
happen
.
Also
spoke
to
a
bloke
at
work
and
he
said
yep
all
normal
.
But
my
mate
has
the
120
series
and
said
is
a
pain
in
the
ar
#
e
trying
to
work
out
his
fuel
consumption
just
running
off
the
first
tank
of
fuel
but
»
a class
="
tt_keyword lb
¡
rel
="
Ö
43
µ
834"
href
="/
places
/43
µ
834/
vic+mine
">
mine
à
½
is
the
same
with
the
way
it
works
.
Only
way
I
reckon
is
fill
both
up
chockers
drive
around
then
refill
both
again
.
Regards
Steve
M
»
div
>
div
>
AnswerID:
228367
Reply By: Member - John R (NSW) - Monday, Mar 19, 2007 at 17:24
Monday, Mar 19, 2007 at 17:24
That
was
possibly
me
Juzzie
.
The
120
uses
an
ejector
pump
(
no
moving
parts
)
which
is
located
in
the
main
tank
to
continuously
transfer
fuel
from
the
sub
tank
to
the
main
.
Because
it
is
a
low
pressure
transfer
system
it
just
stops
whenever
the
main
is
full
.
The
fuel
for
the
engine
is
drawn
from
the
main
tank
at
all
times
.
So
,
if
the
main
tank
'
s
full
and
if
there
is
fuel
in
the
sub
tank
it
just
transfers
at
the
engine
consumption
rate
.»
br
/>
»
br
/>
Therefore
there
'
s
no
chance
you
will
end
up
with
"
stale
"
fuel
in
your
system
.»
br
/>
»
br
/>
The
downside
of
this
type
of
system
is
that
if
you
hole
either
tank
you
run
the
risk
of
losing
most
,
if
not
all
of
your
fuel
.»
br
/>
»
br
/>
Holing
the
main
is
the
most
serious
scenario
,
because
it
will
empty
out
(
whilst
still
transferring
fuel
from
the
sub
).
Then
there
'
s
no
way
to
transfer
fuel
from
the
sub
(
until
at
least
you
can
get
the
leak
fixed
and
engine
started
,
which
will
run
the
ejector
pump
and
transfer
fuel
:-)
The
problem
here
is
that
while
all
this
is
happening
a
lot
of
fuel
from
your
sub
will
be
transferred
into
the
main
(
which
is
draining
through
the
leak
).
So
you
'
re
losing
some
of
its
contents
even
though
it
'
s
not
leaking
:-(»
br
/>
»
br
/>
If
you
hole
the
sub
,
then
you
just
lose
its
contents
.»
br
/>
»
br
/>
With
a
selectable
tank
system
ala
90
series
you
are
afforded
some
protection
from
the
first
problem
.»
br
/>
»
br
/>
We
have
several
of
these
pumps
in
our
planes
.
They
run
automatically
and
never
break
down
.
Quite
ingenious
actually
:-)»
div
>
div
>
AnswerID:
228370