Fiat Bravo Service Manual page 259

Bravo-Brava ty
16v
Engine
Fuel system
10.
CHECKS, ADJUSTMENTS AND REPAIR OPERATIONS ON HITACHI MPI SYSTEM
When working on a vehicle equipped with a Hitachi MPI system, the following precautions
should be observed:
- do not start up the engine with the electrical connection terminals not properly connected or
slack at the battery poles;
- do not use a rapid battery charger to start the engine;
- never disconnect the battery from the electrical system with the engine running;
- for the rapid charging of the battery, disconnect it first from the electrical system;
- if the vehicle is going in a drying oven after painting where the temperatures will be in excess
of 8CFC, it is necessary to remove the engine control unit from the vehicle;
- do not connect/disconnect the multiple connector for the control unit with the ignition switch
in the ON position;
- always disconnect the negative battery lead before carrying out electrical welding on the vehi­
cle.
The system has a memory which is directly supplied by the battery, even with the ignition swit­
ched off, where the values obtained during self-adjustment are stored. The operation of dis­
connecting the battery causes the loss of this data which can only be obtained again after a cer­
tain distance: therefore this operation should be restricted as far as possible.
FUEL SUPPLY CIRCUIT
NOTE Before working on the supply circuit, it is advisable to drain the pressure for the circuit by dis­
connecting the vacuum pick up pipe between the pressure regulator and the inlet manifold and
applying a slight vacuum.
Removing-refitting fuel manifold
Remove the fuel manifold complete with injectors by carrying out the following operations:
- disconnect the fuel supply pi­
pe (1) and the return pipe (2)
from the respective unions at
the fuel manifold;
- disconnect the vacuum pick
up pipe (3) from the pressure
regulator;
- disconnect the electrical con­
nectors from the injectors;
- undo the two bolts fixing (ar­
row) the fuel manifold and re­
move it complete with injec­
tors and pressure regulator.
The injectors do not have a clip:
to remove them therefore simply
release them from their housing
(see detail).
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