1990 HONDA PRELUDE fuel

Operating Tips

For smoother operation, apply the brakes when shifting from
Neutral or Park to a forward or reverse gear.
When parking: bring the car to a stop with the foot brake, hold the brake on and shift into Park, set the hand brake and then turn off
the engine.

NOTE:

Your 4 speed automatic transmission is equipped with a torque
converter lock-up clutch. Because of this, you may notice what
feels like an extra shift as the clutch engages.
CAUTION: Shift into P only after the car has come to a complete stop.
Shift into or out of R only after the car has come to a complete

stop.

Do not "rev-up" the engine when the brake is on and the shift
lever is in D, S, 2 or R.
When stopped on a hill, use the brakes to hold your position, not the accelerator pedal.Do not shift from N or P into D, S, 2 or R when the engine is
above idle speed. Before shifting into gear, make sure your foot
is firmly on the brake pedal. Do not rest your hand on the shift lever or push the shift button
while driving.

Driving Technique

D-4th
Use the D range for normal in-town and highway driving. The car
will start off in 1st and shift automatically to 2nd, 3rd, and 4th. The
further down you push the accelerator, the later the transmission will shift and the faster the car will accelerate.

S3/S4

The "S" shift selector range changes the shift points under part
throttle acceleration, allowing the transmission to stay in each lower
gear for a longer period before automatically upshifting. With the shift selector in the "S" range, the "S3" indicator light in the dashpanel will come on and the transmission will shift from 1st to 2nd
and 3rd but not 4th. This is especially useful when climbing or
descending grades. While driving in the "S" range, the car's performance is improved but fuel economy is reduced.
Shifting the Automatic (cont'd)ProCarManuals.comMain Menu t s

Towing a Trailer

Your car is designed primarily to carry passengers and a normal
amount of luggage. Although your car is capable of towing a trailer,
there will be an effect on handling, performance, braking, general
vehicle and tire durability and fuel economy. The weight of the trailer plus its cargo must not exceed a total
of 1,000 Ibs. (450 kg).
The gross vehicle weight must not exceed the Gross Vehicle
Weight Rating (GVWR) indicated on the Certification label (see page 127). The gross vehicle weight is the total weight of the
car, driver, passengers, luggage, hitch and trailer tongue load.
The total weight supported by each axle must not exceed the Gross Axle Weight Rating (GAWR). The front and rear GAWR's
are shown on the Certification label (page 127). The
distribution of luggage and passengers in the car, as well as the
tongue load and hitch weight should also be considered in terms of the GAWR, which is the maximum amount of weight that
should be supported over the front and the rear axles. You
should have your car and trailer weighed at a commercial
weighing station to check both the GVWR and GAWR's to
confirm that the total weight and weight distribution are within safe driving limits.
The maximum trailer tongue load must not exceed 100 Ibs. (45 kg). Cargo should be distributed so that the tongue load is
approximately 10% of the total weight of the trailor and its
cargo. This is done by distributing approximately 60% of cargo weight toward the front of the trailer and 40% toward the rear. Never load the trailer so that the back is heavier than the front.
This will seriously affect vehicle handling. Be sure the cargo is
secured so that it will not move during driving. TONGUE LOAD
TRAILER WEIGHT
Maximum: 100 Ibs (45 kg)
Maximum: 1,000 Ibs (450 kg)

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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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Maintenance Schedule and Records (cont'd)

Cheek oil and coolant level at each fuel stop,
Under severe driving conditions, service these items twice as often. (See page 80 )ProCarManuals.comMain Menu t s

Engine Oil and Filter

Checking

Check the engine oil a couple of minutes after shutting the engine
off, with the car parked on level ground. Remove the dipstick and wipe it clean. Reinsert it all the way down, then pull it out and read
the level. The level should be between the upper and lower marks.
ENGINE OIL
FILLER CAP

Adding
If the level has dropped close to the lower mark, add oil until it is
even with the upper mark. 1 .Turn the oil filler cap counterclockwise to remove. Add oil, then check the level again. Do not overfill.
2. Reinstall the cap and twist clockwise until it stops.

CAUTION:
Be sure the oil filler cap is correctly replaced before starting the

engine.
Engine oil is a major factor affecting the performance and

service life of the engine; you should use only a premium quality

detergent oil labeled SG grade.
LOOK FOR THIS LABEL
ON THE OIL CONTAINER

Use the proper viscosity oil for the
climate in which you drive:
Some oil labels may also include additional designations of quality
such as CC or CD. However, these are acceptable only when
used together with SG.
NOTE:

5W-30 viscosity
oil is recommended for improved fuel economy.

(cont'd)

Ambient Temperature

UPPER

LOWER
DIPSTICKProCarManuals.comMain Menu t s

Engine Oil and Filter (cont'd)
Fuel Efficient Oil
For the best fuel economy from your car, it is recommended that
you use a fuel efficient SG oil. This oil is usually identified by the words such as: "Energy Conserving II," "Gas Saving," and "Fuel
Saving," etc.
Changing Oil and FilterEngine oil and filter should be changed together every 6 months or

7,500 miles (12,000 km), whichever occurs first. The filter is on the

engine block, below the intake manifold.

CAUTION:

The oil filter cannot easily be removed from above the engine.For this reason it is recommended
that the oil filter change be done by a skilled mechanic.

1. Start the car to warm up the
engine, then shut it off.

2. Remove the engine oil filler cap and drain bolt, and drain the oil. ENGINE OIL DRAIN BOLT
A warmed-up engine and the oil in it are hot; be careful not to burn
yourself.
3. Remove the oil filter and let the remaining oil drain out.
4. Install a new fitter according to
instructions on or with the filter.
OIL FILTERProCarManuals.comMain Menu t s

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
Sources of Emissions
The combustion process produces carbon monoxide, oxides of nitrogen and hydrocarbons. The evaporation of fuel in the fuel tank
also produces hydrocarbons. Control of oxides of nitrogen and
hydrocarbons is very important since, under certain conditions,
when subjected to sunlight, they react to form photochemical smog. Carbon monoxide does not react to form smog, but it is toxic.
Honda Motor Co., Ltd. has developed a number of systems which
are highly effective in reducing carbon monoxide, oxides of nitrogen
and hydrocarbons.
The Clean Air Act
The Clean Air Act requires all vehicle manufacturers to explain in writing, the operation and maintenance of their emission control

systems.
Maintenance instructions are included on pages 76—81 ; the
operation of each system is explained on the following.

Replacement Parts

The emission control systems on your new Honda were designed, built and certified to conform with the Federal regulations
implementing the Clean Air Act. Honda recommends only the use of
new, genuine Honda parts or their equivalent. The use of other
replacement parts which are not of equivalent quality may impair
the effectiveness of your car's emission control systems.

Crankcase Emission Control System

To prevent crankcase emissions, your car is equipped with a Positive Crankcase Ventilation (PCV) System which routes blowby
gases from the crankcase, through the PCV valve and intake manifold, into the combustion chamber.ProCarManuals.comMain Menu t s