Fiat Bravo Service Manual page 194

Bravo-Brava @i
16v
Engine
Fuel system
10.
INJECTORS (WEBER I W P 0 0 1 )
The twin jet injectors are used specifically on engines with four valves per cylinder because they allow
the jets to be directed against the two intake valves.
The fuel jet leaves the injector nozzle with a pressure differential of 3 bars and nebulises immediately to
form two cones.
Injector control is «sequential, staged», i.e all four injectors are controlled in accordance with the cylin­
der intake sequence. The supply to each cylinder may begin during the expansion stage up to a time
when intake has already begun.
The fuel manifold presses against the injectors to fasten them into the seats on the intake ducts. They are
also anchored to the fuel manifold by means of «safety clips». Two rubber rings (10) and (11) ensure a
seal to the intake duct and fuel manifold.
The injectors are top-feed type and supplied with fuel from the rear of the case, which houses coil (5)
connected to electrical connector (9).
Wiring connector Checking resistance
I
%
+30o
4 !
1 2 3 4
2 39 1 38
NOTE The numbers in boxes indicate ECU pin
no. in order of cylinder number.
Injector resistance may be measured by dis­
connecting the connector and connecting an
ohmmeter as shown in the figure.
Resistance value 16.2 ohm
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