Technical data
_
,”
I
FUEL SYSTEM
~,6.
If
you
do&
detect specified values,
~ proceed to setting.
~
a.
Break
seal
0
and act on adjusting
screw
0~
u?til speciofied flow value
is obtained.
b. On completion of the setting reseal
the
seating
~
of,
the adjusting screw
#with
the relative
cap.8
,17.
Remount disconnected
compo-
~nents
operating
in reverse order, then
!:effect
further setting.
ACCELERATOR
TH-ROT;TLE
SWITCHs
CALIBRjITION
1. Disconnect female
connecter
from
“throttle
swhch.;
Check
on
male
con-
nectar
the:
following resistances with
a tester. ~
a. With throttle entirely closed
bet-
ween’terminals’2’and 18
one
must
de-
tect a resistance of ablout 0
.
b.
Slowly
rotate throttle: with tester
,between
terminals 2 and 18
one
must
#detect
an’
infinite
resistance before
throttle
bas
rotated by
1’
with respect
to
fully
closed position.
2. If this Con~dition doesn’t take place,
lbosen
screw
@
and
rotate
switch
“until the
con’tact
is
obtained
(resistan-
‘lce
~0
)
between
terminals 2 and 18
with completely closed throttle; then
tighten
screws
again.
,October
1948
3.
Rotate
throttle
60°
f
4’
and
check
full load contact closed, detecting
fol-
lowing resistances on
male
connec-
tors, with tester.
-
With accelerator throttle
open
by
an angle of
a3
60”
f
4O
between
terminals 3 and 13
one
must
de-
tect a resistance’of 0
approxi-
mately.
4. If these value are not detected,
check
accelerator control of replace
switch.
/-o
1
Whenever detected values are higher
than maximum specified values,
check
power supply components and
if they are faulty, replace them.
WARNING: ~
CO
percentage
setting and exhaust
-.shoul
be
carnied
out,
if necessary, only
if ‘an air flow
‘sensor
and electronic CU
have been
replaced.
Operate as stated below::
1.~
Remove
seal
cap
1 Air flow ~
sensorlelectronic
CU
2 CO Setting screw seat sealing cap
1 Screw fixing switch to throttle body
2 Idle rpm terminal (it corresponds to posi-
tion A: closed throttle)
3 Max. rpm (it corresponds to position B:
open throttle)
2. Start engi’ne and run it to normal
running temperature.
CO PERCENTAGE
TIMING AT
EXHAUST
Detect CO percentage on exhaust gas
following the
procedure
stated in
Group 00
-
Engine
M.aintenance
-
Ex-
haust Emission Control.
04.20
3.
Connect
a suitable exhaust gas
analyzer on exhaust pipe outlet.
4. Cautiously act on CO percentage
adjustment screw until specified value
isobtained.
5. When this operation is
complete,
put a new seal cap on CO adjustment
screw
Seat.
PA 32 790088330 1