fuel pump VOLVO S90 1998 Owners Manual

1998 Volvo S90
A new car should be broken-in!

Refrain from utilizing your car's full driving
potential, e.g. full-throttle acceleration, during the
first 1,200 miles (2,000 km).

Automatic transmission

Do not use "kick-down" during the first 1,200
miles (2,000 km).

NOTE - ENGINE OIL:

Although some oil consumption during normal
engine operation, more oil is consumed when the
engine is new as the internal parts generate higher
friction while wearing-in to each other. From the
time the engine is new until the first service is
performed, the oil consumption could be
higher than normal. For this reason, it is
especially important to check the oil every time
you refuel your car during this period. See
page 108.
In general, the rate of oil consumption depends on
such factors as: engine temperature, length of trip,
driving conditions, oil viscosity and quality,
engine speed and acceleration/deceleration.
Checking your engine oil level each time the car
is refuelled is one of the most important items
you can perform to help keep your car in good
running order.

Deposit control gasoline (detergent
additives)

Volvo recommends the use of gasoline containing
deposit control additives. These additives have
shown to be efficient in keeping injectors and
intake valves clean. Consistent use of deposit
control gasolines will help ensure good
driveability and fuel economy. If you are not sure
whether the gasoline contains deposit control
additives, check with the service station operator.
Unleaded Fuel

Each Volvo has a three-way catalytic converter
and must use only unleaded gasoline. U.S. and
Canadian regulations require that pumps
delivering unleaded gasoline be labeled
"UNLEADED". Only these pumps have nozzles
which fit your car's filler inlet. It is unlawful to
dispense leaded fuel into a vehicle labeled
"unleaded gasoline only". Leaded gasoline
damages the three-way catalytic converter and the
heated oxygen sensor system. Repeated use of
leaded gasoline will lessen the effectiveness of
the emission control system and could result in
loss of emission warranty coverage. State and
local vehicle inspection programs will make
detection of misfueling easier, possibly resulting
in emission test failure for misfueled vehicles.

NOTE: Some U.S. and Canadian gasolines
contain an octane enhancing additive called
methyl-cyclopentadienyl manganese tricarbonyl
(MMT). If such fuels are used, your Emission
Control System performance may be affected,
and the Malfunction Indicator Lamp located on
your instrument panel may light. If this occurs,
please return your vehicle to an authorized Volvo
retailer for service.
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1998 Volvo S90
NOTE: Do not add additives yourself to the
gasoline, unless you are recommended to do so
by an authorized Volvo retailer.
Fuel requirements, Refueling pg. 55
Octane Rating

Volvo engines are designed for
optimum performance on
unleaded premium gasoline
with an octane rating, AKI of
91, or above. AKI (ANTI
KNOCK INDEX) is an average
of the Research Octane
Number, RON, and the Motor
Octane Number, MON, (RON
+ MON/ 2).
The minimum octane
requirement is AKI 87 (RON
91).

Gasoline Containing
Alcohol and Ethers

"Oxygenated fuels"
Some fuel suppliers sell
gasoline containing
"oxygenates" which are usually
alcohols or ethers. In some
areas, state or local laws
require that the service pump
be marked indicating use of
alcohol or ethers. However,
there are areas in which the
pumps are unmarked. If you are
not sure whether there is
alcohol or ethers in the gasoline
you buy, check with the service
station operator. To meet
seasonal air quality restrictions,
some states require the use of
"oxygenated" fuel in certain
areas.
Alcohol -- Ethanol
Fuels containing up to 10%
ethanol by volume may be
used.
Ethanol may also be referred to
as Ethyl alcohol, or "Gasohol".
Ethers -- MTBE
Fuels containing up to 15%
MTBE may be used.

Refueling

The fuel tank filler cap is
located behind the door on the
left rear fender. Open cap
slowly during hot weather
conditions.
When filling, position the cap
in the special bracket on the
door.
After filling the tank, install the
cap and turn until a "click" is
heard.
The fuel tank is designed to
hold approximately 21.1 US
gals (80 liters) with sufficient
volume left over to
accommodate possible
expansion of the fuel in hot
weather. The "usable" capacity
is 20.3 US gallons (77 liters).
When the fuel level is low,
such factors as ambient
temperature, the fuel's "vapor
pressure" characteristics, and
terrain can affect the fuel
pumps' ability to supply the
engine with an adequate supply CAUTION:
l Avoid spilling gasoline during
refueling. Gasolines containing
alcohol can cause damage to
painted surfaces, which may not
be covered under the New
Vehicle Limited Warranty.
l Do not use gasoline
containing methanol (methyl
alcohol, wood alcohol). This
practice can result in vehicle
performance deterioration and
can damage critical parts in the
fuel system. Such damage may
not be covered under the New
Vehicle Limited Warranty.
l Allow for fuel expansion by
not overfilling the tank.
Overfilling could also cause
damage to the emission control
systems.
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1998 Volvo S90
2 Audio, Power seats, Hazard warning flashers,
Compartment Lights,
Power Antenna, Trailer Power, 50
3 Power Supply Relay "A" 50
4 Fuel System Relay, Ignition System Relay 50
5ABS-unit 50
6 Air pump, Starter Solenoid, Horn 50
7 Electric Cooling Fan 50
8 Pos./parking Light Relay, Headlight Relay, Fog light
relay 50
*Some of the equipment/systems listed may be
available on certain models only and/or as optional
items only.
Brake system pg. 91

Relay/fuse box (Box B)

The fuses in the relay/fuse box generally protect the electrical compone\
nts in the engine compartment.

The fuses are located under the cover in the relay/fuse box. Undo the fo\
ur clamps and pull out the fuse
you want to check. Look at the fuse from the side to see if there is a b\
reak in the curved wire. Should you
need to replace a fuse, you will find spare fuses in the central fuse bo\
x in the passenger compartment.
Replace the blown fuse with a new one of the same amperage and color. Ne\
ver use a fuse with a higher
amperage! There are a pair of pliers, to help when replacing fuses, in t\
he central fuse box in the passenger
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1998 Volvo S90
compartment.

Location * Amperage
1 Engine control module, Automatic transmission control module 5
2 AC relay 5
3 Relay, air pump, Heated oxygen sensor 15
4 Fuel pump 15
5 Fuel injection, Mass air flow (MAF) sensor, Idle air control system,\

Engine control module 15
6 Automatic transmission control module 15
7 Ignition coil, 25
8 Fog lights 25
9 Spare
10 Positioning/parking lights, left 15
11 Positioning/parking lights, right 15
12 Left high beam 15
13 Right high beam, Instrument panel 15
14 Left low beam 15
15 Right low beam 15
16 A/C compressor 15
17 Horn 15
18 Accessories (see respective accessories instructions)
*Some of the equipment/systems listed may be available on certain models\
only and/or as optional items
only.
Fuses pg. 92
Fuse box in the passenger compartment (Box C)

These fuses generally protect the electrical components in the passenger\
compartment.
The fuses are located inside the cover on the left side of the dash .A n\
umber of spare fuses can also be
found here. Fuses are replaced in the same way as in the relay/fuse box \
in the engine compartment (see
previous page).

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1998 Volvo S90
extreme operating conditions such as trailer
towing in sustained ambient temperatures over
104° F (40° C). However, SAE 10W-30 synthetic
oil would be a better alternative in such
conditions.
SAE 15W-40 should not be used under normal
operating conditions.
American Petroleum Institute
(API) labels. These labels certify
the oil conforms to the applicable
standards and specifications of
the API.
Servicing pg. 110
Torque exhaust and
intake manifold nuts


A loose manifold could alter air/
fuel ratio and cause an increase
in emissions and/or poor
driveability.

Air cleaner

Replace the air cleaner cartridge
with a new one every 30,000
miles (48,000 km). The
cartridge should be replaced
more often when driving under
dirty and dusty conditions, The
filter cannot be cleaned and,
therefore, should always be
replaced with a new one.

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, connections on
heater control servo systems and
hydraulic brake servo.
Fuel system cap, tank
and lines, and
connections


The effectiveness of the fuel
system to contain hydrocarbons
is dependent largely on a
leakfree 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.

Fuel (line) filter

The fuel line filter is located
next to the fuel pump. This filter
should be replaced every
100,000 miles (160,000 km).
The filter is replaced as one
complete unit.
Replace more frequently if
contaminated fuel is introduced
into the tank (or if there is
reason to suspect that this has
occurred).

Timing belt

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:
l Replacing distributor
ignition components e.g.
plugs, coil, etc.
l 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
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1998 Volvo S90
SFI is all-electronic and microprocessor-
controlled. It can continually compensate for
variations in engine load, speed and temperature
to give the best economy and power. An
important feature of the system is a mass air flow
sensor that 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.

Heated oxygen sensor

This is an emission control system designed to
reduce emissions and improve fuel economy. The
heated oxygen sensors monitor the composition of
the exhaust gases leaving the engine. The exhaust
gas analysis is fed into an electronic module. This
adjusts the air-fuel ratio to provide optimum
conditions for combustion and efficient reduction
of the three major pollutants (hydrocarbons,
carbon monoxide and oxides of nitrogen) by a
three-way catalytic converter.
Air pump system

During cold starts, an electric pump is activated
which directs air to the exhaust channels. This
initiates a secondary combustion of exhaust gases
which helps minimize hydrocarbon and carbon
monoxide levels and reduces warm-up time for
the three-way catalytic converter. The pump
begins to function when the engine is started. It
remains in operation until the three-way catalytic
converter has reached normal operating
temperature. A sound may be audible from the air
pump during this warm-up period. This is normal.
When idling, the air pump performs a self-
diagnosis. A soft whining noise can be heard,
which is also normal.
Emissions systems pg. 113


Evaporative control system (EVAP)

The engine is equipped with a fuel evaporation
system which prevents the emission of fuel vapor


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1998 Volvo S90
Engine

Liquid-cooled, gasoline, 6-
cylinder, in-line engine.
Aluminum alloy cylinder
block with cast-iron cylinder
liners cast directly into block.
Aluminum alloy cylinder head
with double overhead
camshafts and separate intake
and outlet channels.
Engine lubrication is provided
by an eccentric pump driven
from the crankshaft. Full-flow
type oil filter. Exhaust
emission control
accomplished by fuel
injection, heated oxygen
sensors and three-way
catalytic converter.
Type designation

Output (SAE J 1349)

Max. torque (SAE J 1349) at
rpm
Number of cylinders
Bore
Stroke
Displacement
Compression ratio
Valve clearance:Volvo B 6304 S

181 hp at 5200 rpm
(135 kW at 73 rps)
199 ft. lbs. (274 Nm) at 4100
rpm
6
3.27" (83 mm)
3.54" (90 mm)
2.92 liters
10.7:1
Self-adjusting


All specifications are subject
to change without notice.
Specifications (cont.) pg. 124
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