Checking Fuel Supply Pipe Seal - Fiat 1998 Marea Service Manual

Engine
Fuel system
10.
Fuel supply circuit pressure check
Prepare the test equipment 1860955000 using the adaptors produced previously and fitted as illustrated in
the diagram below using the valves (a), (b) and (d) in the maximum opening position and valve (c) in
the closed position.
1. Complete electric pump
2. Fuel supply pipe
3. Adaptor (A)
4. Test equipment No. 1860955000
After having discharged the pressure, remove the terminal for the fuel supply pipe (2) from the rapid con-
nector (7) following the instructions given on the previous pages, connect it to the female connector for
the adaptor (A), connect the new male terrninal for the adaptor (B) to the rapid connector (7) and check
that the connectors are properly fitted.
Turn the ignition key to the ON position and check on the pressure gauge (e) that after having increased
to a value of about 3.5 bar, the pressure settles down at around 3.2 bar (the decrease in pressure is due to
the fact that after operating for several seconds the pump cuts out if the engine is not started up).
If there is a decrease in pressure greater than the figures given above, check the seal of the system in the
section upstream of the fuel manifold and check the seal of the injectors following the instructions given
below.

Checking fuel supply pipe seal

Keep the test equipment prepared as described in the previous paragraph, close valve (b), keeping valve
(c) closed and valve (a) in the fully open position.
Turn the ignition key to the ON position and check on the pressure gauge (e) that the pressure, after ris-
ing to around 3.5 bar, settles down to around 3.2 bar (the decrease in pressure is due to the fact that the
pump cuts out after operating for several seconds if the engine is not started up).
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Marea- Marea Weekend
5. Adaptor (B)
6. Fuel manifold
7. Rapid attachment connector
ft
99 range
Print n° 506.763/14