Volvo 1992 240 owner manual Pg Servicing

1992 Volvo 240

Fuel system cap, tank, lines and connections

The ability of the fuel system to control hydrocarbon emissions is dependent largely 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. Repair if necessary.

Air cleaner

Replace the air cleaner cartridge every 30,000 miles (48,000 km) The cartridge should be replaced more often when driving under dirty and/or dusty conditions.

The filter cannot be cleaned and should always be replaced with a new one.

Checking and adjusting idle speed

Your Volvo is equipped with an electronically controlled idle speed system that requires no periodic checking or adjustment.

Lambda-sond™ (oxygen sensor) system

This is an emission control system designed to reduce emissions and improve fuel economy. An oxygen sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic module which continuously influences the amount of fuel injected. This adjusts the air- fuel ratio to provide optimum conditions for combustion and efficient reduction of the three major pollutants (hydrocarbons, carbon monoxide, and nitrogen oxides) through a 3-way catalytic converter.

pg. 79 Servicing (cont.)

Oxygen Sensor

On the B230F engines, the oxygen sensor (Lambda-sond™) is electrically heated. The use of a PTC (Positive Temperature Coefficient) element to heat the Lambda-sond ensures a shorter warm up time

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