Check Exhaust Gas Emissions - Fiat Bravo Service Manual

Introduction
Planned maintenance
00.
12
[Q C H E C K EXHAUST G A S E M I S S I O N S
Start up the engine and let it reach operating
temperature (radiator cooling fan comes on
twice).
Place the opacity metering measuring unit in
a stable position near the vehicle exhaust
pjpe (the opacity meter exhaust must be po-
sitioned against the w i n d ) .
Connect the measuring unit flexible pipe
with the vehicle exhaust pipe.
Carry out the equipment connections and ad-
justments in accordance w i t h the Manufac-
turers' instructions.
Fully depress the accelerator pedal three
times in quick succession so that the engine
revs limiter speed is reached.
Carry out measurements for five subsequent
full accelerations.
Make a note of the maximum values reached.
To obtain the figure for the test, calculate the
arithmetical average of the three closest val-
ues.
If there is more than one suitable trio, select
theone w h i c h gives the highest average val-
ue.
Compare the values w i t h the limit given on
the plate on the vehicle conforming w i t h the
EEC directive.
Where figures are not available, apply the f o l -
lowing limits from directive 92/55/EEC:
Naturally aspirated diesel engine:
K = 2,5 m
Diesel engine with turbocharger:
K = 3 m
P4A16DJ04
Bravo-Brava
(diesel engines using opacity meter)
1
1
If the figure for the exhaust fumes is
more than 70%, notify the Customer
of the need to carry out a series of
tests on: the condition of the air filter,
injection pump timing and flow rate,
valve clearance and timing, injector
calibration and cleanliness,
sion ratio.
compres-
Print no. 506.670/09