Fiat 1998 Marea Weekend, Service Manual

Page: 317 / 846

Marea- Marea Weekend 9 *<*
99 update
Engine
Fuel system
A
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10.
CHECKS ON FUEL SUPPLY CIRCUIT
THESE OPERATIONS SHOULD BE
CARRIED OUT IN THE PRESENCE
OF A SUITABLE VAPOUR PUR/FI-
CA TION AND EXHAUST SYSTEM
Fuel supply circuit pressure check
Check the pressure of the system and the seal
of the fuel system, as described below, using
equipment 1860955000, fitted with two
adapators which should be constructed as de-
scribed below:
- adapator (A) use a new type rapid attach-
ment female terminal and a length of pipe
contained in Kit no. 1860955003 and an old
type rapid attachment male terminal con-
tained in Kit no. 1860955001;
- adapator (B) use a new type rapid attach-
ment male terminal and a length of pipe
contained in Kit no. 1860955003 and an old
type rapid attachment male terminal con-
tained in Kit no. 1860955001;
Configure the adapators as illustrated in the
diagram.
The arrow indicates the side to be in-
serted in the test equipment 1860955000
(pressure gauge)
Draining supply system fuel pressure
The fuel supply circuit is kept at a constant pressure of around 3.2 bar, even with the engine switched off;
therefore, before carrying out operations on the supply pipe the pressure must be drained from the system,
using adaptor no. 1870684000 and a special container to collect the excess fuel in.
Proceed as described below:
- Remove the inlet hose from the butterfly casing;
- Remove the protective cover from the attachment on the fuel manifold;
- introduce the male terminal of the adapator inside the container and fit the rapid connector to the at-
tachment on the fuel manifold, as illustrated in the diagram; in this way, the small amount of excess fuel,
which produces pressure, will be drained into the container and it will be possible to carry out the pro-
cedure for checking the fuel supply system.
- disconnect the adaptor and refit the protective cover.
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