Fiat 1998 Marea Weekend, Service Manual

Page: 257 / 846

Marea- Marea Weekend ft
99 range
16v
Engine
Fuel system
A
10.
CHECKS ON FUEL
SUPPLY CIRCUIT
CARRY OUT THESE OPERATIONS
IN THE PRESENCE OF A SUITABLE
VAPOUR PURIFICATION AND EXA-
HUST SYSTEM
Fuel supply circuit pressure check
Check the fuel supply pressure and the fuel
system seal following the instructions given
below using the equipment 1860955000 with
two adaptors to be constructed as described
below:
- adaptor (A): use a new type female terminal
for rapid attachment and a length of pipe
contained in Kit No. 186095503 and an old
type male terminal for rapid attachment con-
tained in Kit No. 1860955001;
- adaptor (B): use a new type male terminal
for rapid attachment and a length of pipe
contained in Kit No. 1860955003 and an old
type male terminal for rapid attachment con-
tained in Kit No. 1860955001;
Configure the adaptors as illustrated in the
diagram.
The arrow shows the side to insert in
the test equipment 1860955000
(pressure gauge)
Draining supply circuit fuel pressure
The fuel supply circuit is kept at a constant pressure of about 3.2 bar even when the engine is switched
off; therefore, before carrying out any operations to the supply pipe it is necessary to drain the pressure in
the system using the adaptor no. 1870684000 and a special container into which to drain the excess fuel.
Proceed as described below:
- Remove the protective cover from the attachment on the fuel manifold;
- introduce the male terminal for the adaptor inside the container and insert the rapid connector on the
attachment on the fuel manifold, as illustrated in the diagram; in this way the small amount of excess
fuel, which creates pressure, is drained into the container and the test procedures can then be carried
out on th fuel supply system;
- disconnect the adaptor from the attachment and refit the protective cover.
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