FIAT UNO 1983 Service Repair Manual

FIAT UNO 1983 Service Repair Manual UNO 1983 FIAT FIAT https://www.carmanualsonline.info/img/10/56930/w960_56930-0.png FIAT UNO 1983 Service Repair Manual
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Page 191 of 303

FIAT UNO 1983  Service Repair Manual adjustments described in this sub-Section,
however, will require removal of the
carburettor.
39Disconnect the short, curved diaphragm
hose from the top cover. 
40Extract the top cover screws, lift the

Page 192 of 303

FIAT UNO 1983  Service Repair Manual solenoid-operated type, actuated from the
ECU.
7Fuel pressure is regulated according to inlet
manifold vacuum pressure by a fuel pressure
regulator. Excess unpressurised fuel is
returned to the fuel t

Page 193 of 303

FIAT UNO 1983  Service Repair Manual Idle speed and mixture
adjustment¢
29Before carrying out any adjustments, the
engine must be at operating temperature, the
fan having cut in at second speed and then
switched off.
30Release the lockn

Page 194 of 303

FIAT UNO 1983  Service Repair Manual 39Now use the ohmmeter to check the
resistance of the following components.
Supplementary air valve 
40Resistance between the terminals should
be between 40 and 60 ohms at 20ºC (68ºF).
Airflow meter

Page 195 of 303

FIAT UNO 1983  Service Repair Manual Fuel pressure regulator
60Disconnect the vacuum hose from the
regulator (photo).
61Anticipate some loss of pressurised fuel,
and then disconnect the fuel hose from the
regulator. Unbolt and remove the

Page 196 of 303

FIAT UNO 1983  Service Repair Manual 80The injector retaining plate socket-headed
screws may now be removed using an Allen
key. Withdraw the fuel injectors and insulators
(photos).
81New injectors, complete with the fuel rail,
must be pu

Page 197 of 303

FIAT UNO 1983  Service Repair Manual Throttle position switch
(potentiometer) 
90This is located on the left side of the
throttle valve housing (photo). 
91Disconnect the wiring plug, unscrew the
two fixing screws and withdraw the switch

Page 198 of 303

FIAT UNO 1983  Service Repair Manual PART D: 
BOSCH MONO-JETRONIC
FUEL INJECTION SYSTEM
Warning: Refer to the beginning
of this Section before starting
any work.
Description
1The Bosch Mono-Jetronic fuel injection
system fitted to the 13

Page 199 of 303

FIAT UNO 1983  Service Repair Manual necessary processing (photo). A conventional
paper type air filter element is used and this
must be renewed at the specified intervals.
9The ECU is specific to the model type, its
function being to co

Page 200 of 303

FIAT UNO 1983  Service Repair Manual 15Undo the retaining strap bolt and
withdraw the filter from its location bracket.
Disconnect the inlet and supply hose from the
filter. If crimp connectors are fitted they will
have to be cut free an
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