Alfa Romeo 33 Workshop Manual page 33

Check of ,e#hahst emissions
T h e Nprocedure is valid for 1 . 7 elec-
After adjustment of the idle r.p.m.
following the' above described pro-
haust emi.ssions by operating as fol-
lows.
T h i s sempl~ified procedure is for use "
w i t h engines e q u i p p e d w i t h F I A T
TESTER typle wiring.
'Use wiring~ ir&rument No. C. 90034
illustrated ih thecircuitdiagram below:
3 WAY CONN,ECi'OR FOR
MIN AND MAX {WITCH 3 WAY CONNECTOR FIAT TESTER
2 . Rem'otie min.,,and m a x s w i t c h e s
w i r i n g side,connectorandthe 3 w a y
4 . Insert ~ the cormector of the in-
strument it$ the 3 tiaytroublediagnosis
5. Check the state of the LED'diode
and proceed to adjust the screw of the
potentiometer located in the plugged
seating. ?he correct setting is obtained
when the ~"ON" time of the flashing
LED is eqtial to the "OFF' time. When
this setting h'as be&n obtained replug
the seating of,the "CO" screw.
As an alternative to the above pro-
C O M P L E T E
1. D i s c o n n e c t t h e ' w i r i n g ,of t h e
Lambda sensor.
2. Using the spanner A-5.021 2, un-
screw the plug! 0 located at the inlet
of the catalytic silencer box @
470 OHVS 112 W
PIN C
sampling exhatist gas
3. Fit th'e tool C.2.0051 on thefitting
for sampling exhaust gases and con-
gas tester
2 Tube connected to exhaust gas tester
C A R
4 Start the engine and check that
with the engine running on idle the
CO% and the quantity of unburned
hydrocarbons are less than the speci-
fied values.
When the engine is in its normal runn-
ing state a?d the lambda probe is
ing
to the total emiskons before the cata-
in the range'mentioned below.
volume % CO: 0.8 (min) to 1.5 (max)
00-16
5 . S h o u l d lthe C O % n o t fall within
the specified values, it Will be necess-
ary to act on t h e a d j u s m e n t s c r e w
to check that the idle r.p.m. falls within
the specified valupsof 900-1050 r1p.m.
and if it does ndt to follow the pro-
Once the setting has been effected,
re-plugg the'seating with the apropria-
te seal and reconnect the lambda
P A 3 3 3 5 0 0 8 8 3 3 0 0