Saab 9000 - Page 45

42 Technical Descriptfon
Fuel injection (contd.)
Pre-injection
When the ignition is switched on both the main relay
and the fuel pump relay operate
for
a
few seconds.
As soon as the engine control module senses that
the crankshaft has
begun
to
rotate, coolant tempera-
ture dependent fuel injection takes place through the
4 injectors simultaneously. This enables short start-
ing times to be achieved.
If the engine is started and shortly afterwards
switched off again, a fresh pre-injection sequence
will be obtained if 45 seconds is allowed to elapse
with the ignition switched off.
Saab 9000
J73
229
+30
230
589
206a,cn,,
3
I
2
µp
206b1CY1.2>
c
µp
206ClCYl.3>
s
µp
µp
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