Volvo 240 1991 Owner's Manual page 114

Volvo 1991 240 Model
The fuel injection system is all-electronic and is microprocessor controlled. It can continually
compensate for variations in engine load, speed and temperature to give the best economy and power.
The most unique feature of the system is the air mass meter which measures the mass of the inducted air
instead of the volume. In this way the system can make instantaneous adjustments for changes in air
temperature or density, thus always assuring the best economy with the lowest possible exhaust
emissions.
pg. 78 Servicing
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
We recommend that this filter be changed every 60,000 miles (96,000 km). The filter is replaced as one
complete unit.
Replace more frequently if contaminated fuel was introduced into the tank.
Fuel system cap, tank, lines and connections
file:///K|/ownersdocs/1991/1991_240/91240_15.htm (2 of 6)12/30/2006 8:57:16 AM