Checking Fuel Supply Circuit Pressure; Fuel Supply Pipe Leakage Test - Fiat Bravo Service Manual

E n g i n e
Fuel system
10.

Checking fuel supply circuit pressure

Prepare the test equipment 1860955000 using the adaptors produced previously and fitted as illustrated
in the diagram b e l o w placing the ball valves (a)', (b) and (d) in the maximum open position and valve
(c) in a closed position.
1. Complete electric fuel pump
2. Fuel supply pipe
3. Adaptor (A)
4. Test equipment no. 1860955000
After having discharged the pressure, remove the end of the fuel supply pipe (2) from the rapid connec-
tor (7), f o l l o w i n g the instructions on the previous pages, connect it to the female connector of the adap-
tor (A), connect the n e w male end of the adaptor (B) t o the rapid connector (7) and check that the con-
nectors are correctly fitted! •
Turn the ignition key t o the ON position and observe whether the pressure on the gauge ( e ) , after in-
creasing t o about 3.5 bar, settles d o w n at around 3.2 bar (the fall in pressure is due to the fact that after
operating for several seconds the pump is deactivated if the engine is not started up).
If there is a fall in pressure to below the values mentioned above, check the seal of the section of the sys-
tem Upstream of the fuel manifold and check the seal of the injectors following the instructions given
below.

Fuel supply pipe leakage test

Keep the test equipment in the position described in the previous paragraph, close valve ( b ) , keeping
valve (c) closed and valve (a) in the maximum open position.
Turn the ignition key to the ON position and observe whether, after increasing to around 3.5 bar, the
pressure on the gauge (e) settles d o w n at around 3.2 bar (the decrease in pressure is due t o the fact that
after the pump has been working for several seconds it is deactivated if the engine is not started up).
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Bravo-Brava @ i 16v
5. Adaptor (B)
6. Fuel manifold
7. Rapid attachment connector
98 range
Print no. 506.670/16