Technical data
COMPLETE CAR
TO obtain better CO exhaust emission
adjustment it is necessary to operate
measuring the values cylinder by
cylinder using
special
service tool
C, 3.0054 connected as follows:
1
A. Raise car on lift and disconnect
exhaust manifold from cylinder
heads.
2 A. Now~fit small flanges
C.2.0054
with relevant gaskets and pipes for
collection, of exhaust fumes
-
bet-
ween
Bach
exhaust manifold flange
and relevant fitting on cylinder
heads. ~
3 A. Connect exhaust manifold
back’
tb cylinder heads.
The other ends of the four collection
pipes emerge in the engine compart-
ment
andi
being equipped with suit-
able
pfugs,
are set up to test
each
cylinddr CO%.
c.2.oo!x
7.
Ch,eck
the idle r.p.m. and if
necessary adjust it again repeating
the operations described at step 5.
8.
@-set
the play in the idle levers
to 1 mm by tightening the stop screws
and
th’en
check that the carburetors
open
simultaneously by acting on the
:Point
where the accelerator
table
is
attached,
‘effecti’ng
short
Sharp
spurts
of acceleration (1200
-
1300
r.p.m.).
Adjust’the stop screwsfurther toobtain
Perfect synchronisation of the carbu-
retors.~
9.
Close the vacuometer valves and
remove
the tubing from the fittings.
PA333500883300
Check
idle r.p.m.
The
procedure
is valid for 1.7 elec-
tronic
injection engines with or
with-
out catalytic convertor.
1. Connect the engine to a rev
counter.
2. Connect an exhauster to the
exhaust tail-pipe.
3. Start the engine and run it to
normal running temperature (Engine
oil
temperature
75-8OoC).
4. With the gears in neutral and the
ancillary
devices
tut
out
check that
the engine
r.p.m.
falls within the
specified values.
For 1.7 electronic injection engines
with catalytic convertor.
\
f100
idle r.p.m. 950
_
5.
For
1.7
electranic
injection engines
idle
r.p.m.
800
-
900
5.
If the idle r.p.m.
does
not ifaIl
within these values, adjust by operat-
ing as follows:
(a) Loosen the locknut
@
and turn
the screw
@
until the correct r.p.m.
is obtained.
(b)
Lock
the locknut
0
1
Locknut
2
Idle
r.p.m.
adjustins
screw
00-l
SI2
Check
exhaust emission
Procedure
is applicable to 1.7
elec-
tronic
injection
engines
without
catalytic~convertor only.
After adjustment of the idle r.p.m.
following the above described
pro-
cedure,
~proceed
to the check and
adjustment (if necessary) of the ex-
haust emissions by operating as fol-
lows. ~
1. Switch on the gas exhauster, start
the engine and run it to normal runn-
ing temperature.
2. With engine on idle and using a
suitable,exhaust gas tester, check that
the percentage of CO and the quantity
of
hydrocarbons
are less than the
specified values.
Admissible CO% 0.8
-
1.7
1 Exhaust
tail-pipe
2 Probe of exhaust tester
3. Should the CO% be above the
admissile limit it
Will
be necessary to
act on ~ the appropriate screw
p9s-
itioned
iIn
the debimeter.
4. It
Will
then be necessary to check
thatidle’r.p.m.fallswithinthespecified
values850f50r.p.m.andif
itdoesnot
the “ldle
r.p.m.
Check”
Will
have to be
repeated.
May
1988