1990 HONDA PRELUDE fuel pressure

Speedometer

The speed is indicated in miles per hour (outside scale) and
kilometers per hour (inside).

Odometer

The numbers on the odometer indicate miles.
The odometer registers total distance traveled, and serves as your
guide for determining when periodic maintenance is due. Federal law makes it illegal to alter the odometer of any motor vehicle with the
intent to change the number of miles indicated.

Trip Meter
The numbers on the trip meter indicate miles.
The trip meter can be returned to zero by pushing in the resetbutton. Use it for checking fuel consumption or distance traveled per trip.

Tachometer
The tachometer indicates engine speed in revolutions per minute.The beginning of the RED ZONE indicates the maximum allowable
engine R.P.M. Do not run the engine with the tachometer indicator
needle in the RED ZONE.

Fuel Gauge
FUEL TANK CAPACITY: 60 l (15.9 US gal, 13.2 Imp gal)
As a convenience, the gauge continues to show the same fuel level as when the ignition was last on. After refueling, the gauge will
slowly change to the new fuel level when the ignition is switched on.
When the needle first indicates E (empty), you have a usable reserve left in the tank of about:
4 l
(1.1
US gal, 0,9 Imp gal)
Coolant Temperature GaugeCAUTION:
The needle should stay within the white range. If the needle reaches the red line at "H" (Hot), pull safely off the road, stop the
engine and check the coolant level in the reserve tank on the passenger side of the radiator under the hood.
Do not remove the radiator cap when the engine is hot. The
coolant is under pressure and may blow out and scald you.

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Warning and Indicator Lights (cont'd)

Oil Pressure Warning Light

A severe fluctuation in engine oil pressure will cause this light to
flash on and off. You should stop as soon as possible, check the oil level, and add oil if necessary.
The oil pressure warning light will come on, and remain on, if there is insufficient oil pressure or when the ignition switch is turned on
with the engine not running. If the light should stay on while driving,
get the car off the road as soon as you can, turn the engine off and
check the engine oil level (see page 83).
Even if the oil level is correct, the engine should be checked by a
Honda dealer before the car is driven again.

NOTE:

The oil pressure warning light will only light as a result of low oil pressure. It is not directly an oil level indicator.
CAUTION:
Running the engine while the oil pressure warning light is on
constantly may cause immediate and severe engine damage.
Cruise Control Indicator Light
When the cruise control system is on, this indicator light is on (see
page 35 and 36).

Fuel Reserve Warning Light

If the warning light glows, it means you should refuel, because the
tank contains less than:
10 l (2.6 US gal, 2.2 Imp gal) CRUISE
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Gasoline (cont'd)
NOTE:
Fuel system damage or vehicle performance problems resulting
from the use of such fuels is not covered under the new car warranties. Honda cannot endorse the use of fuels containingmethanol since evidence of their suitability is as yet incomplete. Before purchasing fuel from an unfamiliar station, try to confirm
whether the fuel contains alcohol; of what kind, and how much. If
you notice any undesirable operating symptoms after using a
gasoline that contains alcohol, or one that you think contains
alcohol, switch to an unleaded gasoline, as recommended on page 55.
Operation In Foreign Countries In order to comply with U.S. Federal Emissions Regulations, you
must use unleaded fuels of the recommended octane rating. These
fuels may not be available in other countries. If you intend taking your car outside the U.S. or Canada, write to American Honda
Consumer Affairs (stating the year and model of your car) at the
address below for information regarding modifications you mayneed to have done.
American Honda Motor Co., Inc.
Consumer Affairs

100 W. AIondra Blvd.,
Gardena, CA 90248
Fuel Filler Door and Cap
Gasoline is extremely flammable and is explosive under certain
conditions. Perform this operation in a well-ventilated area with
the engine stopped. Do not smoke or allow open flames or sparks in the area or where gasoline is stored.
The fuel filler door is opened by pulling up on the lever at the leftside of the driver's seat.
The door will lock automatically when closed; push it until it clicks.

CAUTION:

You may hear a hiss when you open the filler cap. This sound is residual pressure escaping from the fuel tank. Open the cap slowly
and remove the cap after the hissing stops. Do not overfill the tank;
fill only until the gas pump clicks off automatically and never top off.ProCarManuals.comMain Menu t s

Open

Close

Fuel vapor is extremely hazardous under certain conditions.
Always stop the engine before refueling, and never refuel near
sparks or open flames.

CAUTION:

When reinstalling the fuel cap, be sure both tabs on the cap are engaged in the slots of the filler neck and turn the cap until it stops.
If you replace the cap, use only a genuine Honda replacement part
or Its equivalent. Failure to use the proper part could cause serious
fuel system problems.
How to Improve Your Gas Mileage:
Drive at a smooth, steady pace to avoid unnecessary
decelerations and stops — accelerating back to speed uses more
fuel.
Plan trips to avoid rush hour traffic if possible.Make sure the parking brake is completely released.
Consolidate trips whenever possible.
Keep vehicle weight to a minimum by removing unnecessary
items from the luggage area.
Whenever possible, use fresh air from the dash vents to keep
cool when driving; open windows, or use of the air conditioningboth affect fuel economy.
Keep the tires adjusted to the recommended pressure.
Tire Pressure (measured cold)

Front: 195 kPa (28 psi)
Rear: 180 kPa (26 psi)
195 kPa (28 psi) : (Si with 4WS)

Condition of Your Car

You can only get maximum fuel economy if your car is in top running condition. Have all required maintenance done at theproper intervals. Check tire pressures and tire wear frequently. If
tire wear is uneven, have the alignment checked by your Honda dealer. Proper alignment saves gasoline and prolongs tire life.
RELEASE LEVER

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Check the following items at each fuel stop:

1. Engine oil level.

2. Radiator coolant level.
Check the following items periodically: 1. Brakes: for braking efficiency, brake pedal travel and hydraulic fluid level.
2. Lights: for operation of headlights, taillights, side marker lights, stoplights, turn signals and back-up lights.
3. Tires: for correct pressures (including spare); inspect for cuts and uneven or excessive wear. Rotate every 7,500 miles (12,000 km)
in the pattern shown on page 107.
4. Steering: for excessive play or vibration while driving. 5. Exhaust system: for leaks or loose mounts.
6. Wipers: for operation of windshield wipers and washer, and condition of wiper blades.
7. Seat belts: for condition of fabric and buckles, and operation of the restraint mechanism.

8. Battery condition.

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Fuel Filters/Clutch Fluid

Fuel Filters
(2.0 S)
There are two fuel filters in your car; the main filter is located near
the left side of the fuel tank and an auxiliary filter is at the left side
of the air filter in the engine compartment. Both should be replaced at 60,000 miles (96,000 km) or 48 months,
whichever comes first, or any time you suspect contaminated gas
may have clogged them.

For easier access to the main filter, remove the left rear wheel to
inspect or replace the filter.
The fuel filter is located in the engine compartment, on the right
center of the firewall. It should be replaced at 60,000 miles (96,000km) or 48 months whichever comes first, or any time you suspect

contaminated gas may have clogged it.

CAUTION:
Because the fuel system is under pressure, the filter should be
replaced only by a qualified Honda technician.

CLUTCH FLUID
RESERVOIR

Clutch Fluid
Check the fluid level in the clutchreservoir periodically; it should be
between the MAX and MIN marks
on the reservoir.
If the level is near the MIN mark, add

fluid to raise it to the MAX mark. Do not overfill. Use only brake fluid

manufactured to DOT 3 or DOT 4

specifications from a sealed

container. Follow the manufacturer's instructions printed on the can.
NOTE:

A low clutch fluid level may be an indication of clutch fluid leakage.
You should have your clutch checked if the clutch fluid level in the reservoir is low.
When removing the rear wheel, use safety stands to support the
car.

AUXILIARYFILTER

(2.0 Si,Si)
MAIN FILTERProCarManuals.comMain Menu t s

Emission Controls (cont'd)
Intake Air Temperature Control System (2.0 S)The air control valve mounted inside the air cleaner snorkel
automatically opens and closes according to the intake air
temperature. The carburetor then receives air of constant
temperature which results in lower exhaust emissions.
Carburetor Controls (2.0 S)—Throttle controller — This system controls the throttle during
gear shifting, reducing the amount of HC caused by unburned

fuel mixture.

— Choke opener — When starting a cold engine, this device
opens the choke slightly. This reduces the amount of HC and

CO.

— Altitude Compensation devices — The Air Jet Controller (AJC)
has an atmospheric pressure sensing bellows. The AJC is
designed to control the amount of additional air fed to the
carburetor jets to maintain good driveability at any altitude. Ignition Timing Control System
This system automatically controls the ignition timing to reduce

the amount of HC and NOx.

Exhaust Gas Recirculation (EGR) [Except California 2.0 S models]
The EGR system is designed to control the formation of oxides of nitrogen (NOx) caused when fuel mixture burns at high
temperature. It works by recirculating exhaust gas through the EGR valve and intake manifold into the combustion chambers
where it reduces peak temperature by diluting the air/fuel mixture.
Catalytic Converter
The catalyst is used to convert hydrocarbons (HC), carbon monoxide (CO) and oxides of nitrogen (NOx) in the exhaust gas,
to carbon dioxide (CO 2
), dinitrogen (N 2
) and water vapor.
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Index (cont'd)

Emission Controls.........................130

Engine
Coolant.......................................88
Coolant Temperature
Gauge....................................20
Identification Number .............127
Oil and Filter...............................83
Oil Pressure
Warning

Light .......................................22

Specification ...........................125

Exhaust Controls....................131
Engine Exhaust Ga
s Warning

....................................................64

Evaporative Emission Control
System ....................................131
Exhaust Gas Recirculation...........132
Exterior Care.................................110
Filters

Air...........................................94
Engine Oil ...................................84

Fuel.............................................96

Fluid .....................................See "Oil"

Foreign Countries, Operation in ...............................56
Four Wheel Steering.......................59 Front Seat
Adjustment..................................5

Fuel

Filter Door and Cap...................56
Fuel Reserve
Warning

Light .......................................22

Gauge.........................................20

Gasohol......................................55

Gasoline ......................................55

Requirement..............................55

Filter...........................................96
Fuse

Checking and Replacing .........101

Specification...........................126 Gasoline............................See"Fuel"
Gas Station Information
...........................................back cover

Gauges............................................20
Glove Box ........................................39
Hazard Warning

Indicator Light ...........................21
Hazard Warning System................33

Headlights

Flasher.......................................31
Headlight Motor
Switch ...........32

High Beam Indicator..................21
High Beam/Low

Beam

Switch...................................31
If the

Retractable Headlights
do not operate ...................123

Reminder Chime

.......................30

Retractable Headlight Motor Warning Light .......................25

Switch.......................................30
Headlight High
Beam Indicator

Light ...........................................21

Head Restraints.................................8

Heating.............................................45

High Bea
m

Switch .......................................31
Indicator Light ...........................21

Hood Latch.....................................39
Identification Numbers.................127
Ignition
Keys.............................................3

Switch........................................58

Indicator Lights ...............................20
Inflation Pressures, Tire..............105
Instrument Panel....................19
Instrument Panel
Brightness

Control.......................................33

Interior light .....................................33
Interior Trim Care .........................110 Jack .............................................116
Jump Starting ...............................119ProCarManuals.comMain Menu t s