Fiat 1995 Brava, Service Manual

Page: 410 / 544

E n g i n e Bravo-Brava fto
Fuel system
10.
Test tables
This fault diagnosis table is applicable only if the engine is efficient and the electrical equipment
has been properly checked.
ANOMALY CAUSE
REMEDY
When warm, the engine
will not start or starts
with difficulty
Tank empty, ventilate blocked tank
Water in fuel
Air in fuel system
Injection order does not corre-
spond to firing order
Engine arrest solenoid short-cir-
cuited
Fittings loose, leaks from pipes,
pipes broken
Injectors defective or excessively
dirty
Incorrect injection pump timing
Incorrect injection pump setting
Drain water from filter, clean filter
and bleed air
Bleed and eliminate air leaks into
system
Fit pipes from pump to injectors in
correct order
Check electrical leads and/or re-
place solenoid
Tighten fittings and eliminate leaks
Clean injectors, check and/or re-
place
Restore correct injection pump
timing and adjust advance
Check injection pump timing at
bench
When cold, engine does
not start or starts with
difficulty
Tank empty, ventilate blocked tank
Water in fuel
Air in fuel system
Heavy paraffin build-up in fuel fil-
ter
Injection order does not corre-
spond to combustion order
Engine arrest solenoid short-cir-
cuited
Fittings loose, leaks from pipes,
pipes broken
Pre-heating circuit defective
Injectors defective or excessively
dirty
Incorrect injection pump timing
Incorrect injection pump setting
Drain water from filter, clean and
bleed
Bleed air and eliminate leaks in sy-
stem
Replace filter and use winter-type
fuel
Fit injection pipes from pump to in-
jector in the correct order
Check electrical leads and/or re-
place solenoid
Tighten fittings and eliminate leaks
Check glow plugs and ECU
Clean injectors, check and/or re-
place
Restore correct injection pump
timing and adjust advance
Check injection pump timing at
bench
1
12 Publication no. 506.670