Saab 9000 Service Manual page 44

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Fuel injection
Injectors
The injectors are of the solenoid type with needles
and seats and open when current flows through the
coil and close by means of a powerful spring when
the current is broken.
To obtain the best possible combustion and therefore
cleaner exhaust gases, the injectors are provided
with 4 holes which ensure good fuel distribution.
The fuel jets are very precisely set (two jets on each
intake valve). This makes the fixing of the injectors
very important. To ensure that this is done properly,
the injectors are fixed in pairs in special mounts be-
tween cylinders 1-2 and cylinders 3-4.
The injectors receive their voltage from the main
relay, whilst the ECM grounds the injectors as fol-
lows:
• injector 1 is grounded via pin 3
• injector 2 is grounded via pin 4
• injector 3 is grounded via pin 5
• injec_tor 4 is grounded via pin 6
+30
230
Saab 9000
Technical Description 41
I
229
589
2Q6a
(CYl.1) 3
1 2
µp
206b
(CYL2) 4
µp
206C
(CYL3) 5
µp
µp
G7P