Fiat 1996 Brava Service Manual page 46

Introduction
Planned maintenance
Bravo-Brava
00.
[ £ CHECK EXHAUST GAS EMISSIONS
(diesel engines using opacity meter)
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
pipe (the opacity meter exhaust must be po­
sitioned against the wind).
Connect the measuring unit flexible pipe
with the vehicle exhaust pipe.
Carry out the equipment connections and ad­
justments in accordance with 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 which gives the highest average val­
ue.
Compare the values with the limit given on
the plate on the vehicle conforming with the
EEC directive.
Where figures are not available, apply the fol­
lowing limits from directive 92/55/EEC:
Naturally aspirated diesel engine:
K = 2,5 m -
1
Diesel engine with turbocharger:
K = 3 m '
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, compres­
sion ratio.
P4A16DJ04
12
Print no. 506.670/09