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Ftief Injection System
General
This is an electronically controlled
intermittent low pressure injection
system.
The fuel is injected upstream of the
intake vaives by means of solenoid
injectors supplied at constant pressure.
Flow is controlled by means of varia-
tion in the opening time of the injectors.
The main factor controlling flow is
the direct measurement of drawn air
by a special sending unit which trans-
mits the most important information
for fuel metering to the electronic
control unit.
The system is also provided with a
certain number of measuring sensors
which provide the electronic control
unit with the information required to
optimize the composition of the mix-
ture in all engine operating conditions.
Exhaust Gas Emission Control
System
For the control of exhaust gas emis-
sions, the injection system is fitted with
an oxygen sensor {Lambda probe)
which measures the oxygen content of
the exhaust gases and transmits any
adjustment of the air-fuel mixture to
the control unit. It is thus possible
with the aid of a catalytic converter
fitted to the exhaust pipe, to reduce to
a minimum the harmful residues con-
tained in the exhaust gases.
Oxygen Sensor {Lambda probe)
Every 30,000 miles: Renew oxygen
sensor. An indicator on the
instrument panel lights up on
completion of 30,000 miles
(see page 7) signifying that the sen-
sor must be replaced.
To renew sensor proceed as follows:
— Disconnect probe cable A.
— Back off probe B from its seat C
on exhaust manifold.
— Fi 1 new probe lubricating threaded
part with anti-seize, ami-rust grease.
— Reconnect cable A.
— Press button to zero indicator.
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