Volvo 850 - Manual (Page 142)

1994 Volvo 850
Check the coolant level and add as necessary. See page 8:16
Fault in electric cooling fan
Check that the electric cooling fan functions properly.
WARNING! The electric cooling fan may start or continue to operate (for up to 6 minutes) after the
engine has been switched off.
pg. 6:17 Service diagnosis (cont.)
Excessive fuel
consumption
Spark plugs worn.
Replace plugs.
Erratic idle
(misfiring)
Intake system leaking.
Check vacuum hose connections to manifold and idle air control valve.
Worn spark plugs.
Remove. Clean or replace plugs if necessary.
Engine stops running at irregular
intervals
Defective wires.
Check terminals at: fuel pump, coil, ignition switch and relays.
Intake system leaking.
Check vacuum hose connections at manifold and idle air control valve.
Fuel filter clogged.
Clean fuel tank filter and replace fuel line filter.
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