Specifications

1979 Volvo 264 265
Checking and adjusting idle speed and mixture ratio and manifold balance
This check should be made every 15,000 miles (25,000 km).
The idling speed should also be adjusted and the mixture ratio and manifold balance checked at the 600-
1,200 mile (1,000-2,000 km) inspection.
Fuel system cap, tank and lines and connections
The effectiveness of the fuel system to contain hydrocarbons is largely dependent on a leak-free system.
Check for proper sealing of gasoline filler cap which contains "O" ring type seals. Check all evaporative
hoses in vehicle for tightness. Check fuel lines under vehicle and repair if necessary.
Inspection of fuel injection electrical connections
The electrical connections and fuel lines in the injection system should be checked for chafing and
corrosion every 15,000 miles (25,000 km).
III Engine Ignition Components
Change spark plugs
The spark plugs should be changed every 15,000 miles (25,000 km).
However, city driving or fast highway driving may require changing after 7,500 miles (12,500 km) of
driving. When fitting new plugs, be sure to fit the right type (Volvo Part No. 273541-4 or equivalent).
Torque to 7-10 ft. lbs. (10-14 Nm).
When changing the plugs, check that the suppressor connectors are in good condition. Cracked or
damaged connectors should be replaced.
When changing spark plugs, clean the cables and cable terminals, also the rubber seals. If the car is
driven on roads where salt is used during the winter, coat the cables with silicone.
Distributor cap and rotor
Check the distributor cap and rotor for wear, cracks, carbon formation, dirt and corrosion.
pg. 53 Emission control system
Ignition timing
Distributor advance mechanism
The ignition timing should be inspected at the 600-1,200 mile (1,000-2,000 km) inspection and after that
every 15,000 miles (25,000 km). All adjusting work should be done with the proper equipment. The
distributor is one of the most sensitive engine units. Careless handling can lead to decreased engine
output and high fuel consumption or even serious damage to the engine.
The distribute advance mechanism should be checked every 30,000 miles (50,000 km).
Ignition wiring
The ignition system consists of a primary and secondary system. The secondary system contains the
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