Volvo 265 Specifications download pdf (Page 57)

1978 Volvo 264 265

Torque exhaust manifold nuts

The manifold nuts should be torqued at the 600-1,200 mile inspection. A loose manifold could alter

air/fuel ratio and cause an increase in emission and/or poor driveability.

Valves

The valve clearance should be checked every 30,000 miles.

Vacuum fittings, hoses and connections

Unstable idle, misfiring or poor emission control is often caused by leaking vacuum hoses or

connections. Check hoses and connections on distributor vacuum unit, EGR valve (when

applicable) and connections on heater control servo systems and hydraulic brake servo.

II Engine Fuel System

Fuel (91 octane)

Unleaded fuel is required for models with catalytic converter (all models).

A label on the instrument panel and on the rear fender, near the filler inlet, will remind of this

requirement.

It is unlawful to dispense leaded fuel into a vehicle labeled "unleaded gasoline only".

CI system

The B27F engine is provided with a fuel injection system called the CI system (Continuous

Injection). Fuel injectors are open and inject fuel as long as the engine is operating.

This system has few moving parts, is reliable and meets the exhaust emission standards at

maximum efficiency.

Air supplied to the engine is continuously measured and determines the amount of fuel injected.

The air flow is regulated by two throttle valves.

The air flow sensor and the fuel distributor are integrally built as a single unit. A lever is actuated

by the air flow to produce continuous fuel distribution.

Special instructions for work on the fuel injection system

Extreme cleanliness is essential when working on the injection system. Great care must be

observed.

Injection system service should be handled by qualified technicians, using equipment intended for

this service.

Fuel (line) filter

The fuel filter is located on the firewall. This filter is to be changed every 30,000 miles. The filter

is replaced as one complete unit.

Replace more frequently if contaminated fuel was introduced into the tank.

Air cleaner

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Volvo 265 Specifications Page 57