2000 VOLVO C70 fuel pressure

Fuel system
The fuel system is allelectronic and is microprocessorcontrolled. It can continually compensate for variation in engine
load, speed and temperature to give the best economy and power. A mass air flow sensor measures the inducted air. 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.
Heated oxygen sensor
This is an emission control system designed to reduce emissions and improve fuel economy. The heated oxygen sensor
monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic
module. This adjusts the airfuel ratio to provide optimum conditions for combustion and efficient reduction of the three
major pollutants (hydrocarbons, carbon monoxide and oxides of nitrogen (NOx) by a threeway catalytic converter.
Secondary Air Injection (certain models)
This system adds air to the hot exhaust gases as they are expelled from the engine. This causes a secondary
combustion of residual hydrocarbons and carbon monoxide, resulting in lower emissions levels in the exhaust gases.
Crankcase ventilation
The engine is provided with positive crankcase ventilation which prevents crankcase gases from being released into the
atmosphere. Instead, the crankcase gases are admitted to the intake manifold and cylinders.
Evaporative control system
The car is equipped with an evaporative control system which prevents gasoline vapor from being released into the
atmosphere.
The system consists of a fuel tank with filler pipe and cap, a rollover valve, a Fill Limit Vent Valve (FLVV), vapor
vent lines, a charcoal canister, a purge line, a purge control valve and engine connections .
In addition, there is a pressure sensor connected to the fuel tank and a filter -protected Canister Close Valve (CCV) on
the atmospheric side of the canister, for system diagnosis.
The gasoline vapor is channeled through the rollover valve and the FLVV via the vapor vent lines into the charcoal
canister, where it is stored. When the engine is started, the gasoline vapor is drawn from the charcoal canister to the
engine's air intake system and into the combustion process.
NOTE:
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All specifications are subject to change without notice.
pg. 124 Specifications
Cooling system
Type: Positive pressure, closed system
Thermostat begins to open at 180° F (87° C)
Coolant: Volvo original coolant/antifreeze
Capacity: 7.4 US qts. (7.0 liters)
Fuel system
The engine is equipped with a multiport fuel injection system.
Distributor ignition system
Firing order:12453
Distributor ignition setting: Not adjustable
Spark plugs: Champion RC8PYP (or equivalent)
Spark plug gap: 0.03" (0.75 mm)
Tightening torque: 18.4 ft. lbs. +/ 3.7 ft. lbs. (25 Nm +/ 5 Nm)
WARNING!
The distributor ignition system operates at very high voltages. Special safety precautions must be followed to
prevent injury. Always turn the ignition off when:
· Replacing distributor ignition components e.g. plugs, coil, etc.
· Do not touch any part of the distributor ignition system while the engine is running. This may result in unintended
movements and body injury.
Replacing spark plugs
The spark plugs should be changed every 30,000 miles (48,000 km). However, city driving or fast highway driving
may necessitate changing after 15,000 miles (24,000 km) of driving. When installing new plugs, be sure to fit the right
type and use correct torque, see "Specifications". When changing the plugs, check that the suppressor connectors are in
good condition. Cracked or damaged connectors should be replaced. When changing the spark plugs, clean the
terminals and the rubber seals.
Front suspension
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Engine compartment119
Engine oil114,115,122
Engine oil - checking/changing114
Engine oil pressure17
Exterior courtesy lights20
F
Fog light - rear17
,22
Fog lights - front22
Front courtesy lights49
Front fog lights22
Front seats46
Front seats - heated30
Front seats - memory function46
Front suspension124
Fuel gauge16
Fuel level17
Fuel requirements56
Fuel system124
Fuel tank cover - opening37,57
opening manually97
Fuses91,92,93
Fuses - replacing91
G
Gas tank cover - opening37
,57
opening manually97
Generator17,126
Generator warning light18
H
Hand brake30
Handling67
Hazard warning flashers23
Headlight adjustment86
Headlight wiper blades - replacing96
Headlights20
Heated front seats30
Heated side-view mirrors23
Heating35
Heating and air conditioning33
High beams17
Hoisting the car110
HomeLink®186,187,188
Hood51
I
Ignition switch21
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The following should be checked regularly: *
1 Washer fluid reservoir should be filled with water and solvent (wintertime: windshield washer anti-freeze). See
page 117.
2 Coolant level should be between the expansion tank marks. Mixture: 50% anti-freeze and 50% water. See page 118.
3 Power steering - When cold, the level must not be above the COLD mark and when hot it must not be above the
HOT mark. Top up if the level drops to the ADD mark with ATF fluid. See page 116.
4 Engine oil level should be between the dipstick marks. The distance between the marks represents approx.
1.6 US qts (1.5 liters). See page 114.
5 Brake fluid - check, without removing the cap, that the level is above the MIN mark. Use brake fluid DOT 4+. See
page 116.
* Engine oil should be checked each time the car is refuelled.
Octane rating, see page 57.
Tire pressure, see label located on the rear edge of the right front door.
Bulbs Power Socket US no.
1 55 W - H7
2 30/7 W BA 15s 3357NA
3 55 W PK 22s H1
4 5 W BA 15s 67
5 21 W BAU 15 -
6 21 W BA 15s 1156
See pages 85-87
for more detailed information.
Volvo Car Corporation
Göteborg, Sweden
TP 4360/1 (Canada & USA) 3000.07.98 Printed in Sweden, Elanders Graphic Systems AB, Göteborg 1998

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