1991 ACURA NSX fuel

Fuel Tan k
Replacemen t
Do no t smok e whil e workin g o n fue l system . Kee p ope n flam e awa y fro m you r wor k area .
Mak e sur e lift s ar e place d properl y (se e sectio n 1 ).
1 . Rais e th e car .
2. Remov e th e drai n bolt , an d drai n th e fue l int o a n approve d container .
3 . Remov e th e cente r ro d (se e sectio n 5 ).
4 . Disconnec t th e M/ T shif t cabl e an d M/ T clutc h cabl e o r A/ T shif t cabl e fro m th e transmissio n (se e sectio n 14 ).
5 . Remov e th e bulkhea d panel s (se e se ctio n 20 ) an d acces s panel .
6 . Disconnec t th e C48 6 (6P ) connector .
7 . Disconnec t th e hoses .
CAUTION : Whe n disconnectin g th e hoses , slid e bac k th e clamps , the n twis t hose s a s yo u pull , t o avoi d damagin g
them .
8 . Plac e a jack , o r othe r support , unde r th e tank .
9 . Remov e th e stra p bolt s an d nuts , an d le t th e strap s fal l free .
10 . Remov e th e fue l tank .
NOTE : Th e tan k ma y stic k o n th e undercoa t applie d t o it s mount . T o remove , carefull y pr y i t of f th e mount .
11 . Instal l a ne w washe r o n th e drai n bolt , the n instal l part s i n th e revers e orde r o f removal .
C486 CONNECTO R (6P )
ACCES S
PANE L
TAN K STRAP S FUE
L FILTE R
DRAI N BOL T
49 N- m (5. 0 kgf-m ,36 Ibf-ft )
LOCKNU T
2 1 N- m (2. 1 kgf-m ,
1 5 Ibf-ft )
MOUNTIN G BOL T38 N- m (3. 9 kgf-m , 2 8 Ibf-ft )WASHE
R
Replace .
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Fuel Injection Air (FIA) Control System

Description

The Fuel Injection Air (FIA) Control system enables fresh air to be drawn through the throttle body and fuel injector port.

IDLE ADJUSTING

SCREW
THROTTLE

BODY
FUEL INJECTOR
AIR FLOWProCarManuals.com

Evaporative Emission (EVAP) Controls

Description

The evaporative emission controls are designed to minimize the amount of fuel vapor escaping to the atmosphere. The

system consists of the following components:

A. Evaporative Emission (EVAP) Control Canister

An EVAP control canister is used for the temporary storage of fuel vapor until the fuel vapor can be purged from the

EVAP control canister into the engine and burned.

B. Vapor Purge Control System

EVAP control canister purging is accomplished by drawing fresh air through the EVAP control canister and into a port

on the throttle body. The purging vacuum is controlled by the EVAP purge control diaphragm valve and the EVAP

control solenoid valve.

EVAP PURGE CONTROL SOLENOID VALVE OFF AFTER

STARTING ENGINE

ENGINE COOLANT TEMPERATURE ABOVE 153°F (67°C)

To No. 5 BACK-UP LIGHTS

ALTERNATOR TURN SIGNALS

(15 A) FUSE

FRESH

AIR
EVAP

PURGE CONTROL

DIAPHRAGM VALVE
EVAP PURGE

CONTROL

SOLENOID VALVE
EVAP PURGE

FLOW SWITCH
C. Fuel Tank Vapor Control System

When fuel vapor pressure in the fuel tank is higher than the set value of the EVAP two way valve, the valve opens and

regulates the flow of fuel vapor to the EVAP control canister.

EVAP

TWO WAY

VALVE
FUEL

FILL CAPProCarManuals.com

Electrical Power Steering (EPS)

Outline

The NSX/NSX-T uses an electric motor-driven power steering, which possesses the characteristics best suited for a mid-

engine automobile. This system is a power-assisted steering device, with a motor inside the steering gearbox driven by

the EPS control unit. Its distinctive features are described below:

• Minimized loss of engine horsepower and decreased fuel consumption.

• A linear steering feel and the reduction of kickback.

• The system is compact and lightweight because it requires no complicated hydraulic piping, etc.

ALTERNATOR

TRANSMISSION

CONTROL MODULE (TCM)

EPS CONTROL UNIT

VEHICLE

SPEED SENSOR

PULSE UNIT (MT)

BATTERY

STEERING GEARBOX
STEERING WHEEL

STEERING

COLUMNProCarManuals.com

Types and Materials of Exterior Resin Parts

NOTE: A standard symbol is stamped on the underside of each resin part to show the type of material used.
Example:

HONDA

>PP<


NO.

Part Name

Headlight lid
Front bumper
Front and rear skirts

Mirror

Side sill panel
Trunk ltd spoiler

Rear bumper

Fuel filler lid

Washer Tank
Replacement

see section 23

see page 20-58('93-'96) ,47('91-'92)
see pages 20-59 ('93-'96),48 ('91-'92),

61('93-'96),50('91-'92)

see page 20-20('93-96) ,19('91-'92)

see page 20-71

see page 20-66('93-'96),55('91-'92)
see page 20-60('93-'96),49('91-'92)
see page 20-68('93-'96),57('91-'92)
see page 20-59('93-'96),48('91-'92)

Material

PA6/PPE-M Polyamide/Polyphenylene ether

PBT-P Polybutylene terephthalate
PP Polypropylene

ABS Acrylonitrite butadiene styrene

PA6/PPE-M Polyamide/Polyphenylene ether
UP-G Polyster unsaturated thermoset

PBT-P Polybutylene terephthalate

PA6/PP-E Polyamide/Polyphenylene ether
PP PolypropyleneProCarManuals.com

Opener Cables

Replacement

1. Remove the openers and latches, then disconnect the opener cables.
2. Remove the fuel lid latch.
3. Remove the opener cables by removing the clips as shown,
NOTE:
Before pulling out the opener cables, tie a string to the opener cable so you can pull it back in later. Take care not to bend the opener cables,
4. Installation is the reverse of the removal procedure.
NOTE:
Make sure the opener cables are routed and connected properly,
If necessary, adjust the opener cables by changing the position of the cable housing.
If necessary, replace any damaged clips.

Standard cable housing

position.

REAR HATCH
OPENER CABLE
REAR HATCH

OPENER
Replacement, see page 20-68

FUEL LID OPENER
Replacement, see page 20-68
FUEL LID

OPENER CABLE

FUEL LID LATCH

Replacement, see page 20-68

Clip locations

*: B or E

B: coupe

E: NSX-T (open top)
TRUNK LID

OPENER CASLE

TRUNK LID OPENER
ACTUATOR

Replacement, see page 20-69
TRUNK LID LATCH

Replacement, see page 20-69

LOCK CYLINDER

Replacement, see page 20-69

REAR HATCH

LATCH

Replacement, see page 20-68
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Opener/Latch

Replacement

NOTE: Take care not to bend the cables.

Rear Hatch Opener/Latch:

REAR HATCH
OPENER CABLE

Disconnect the rear

hatch opener cable.
Replacement, see page 20-67
MOUNTING BOLTS

* 6 x 1.0 mm
10 N·m
(1.0 kg-m,

7.2 Ib-ft)
OPENER

HANDLE ROD
Coupe:
RETAINER

CLIP
NSX-T (open top):

RETAINER

CLIP
REAR HATCH
LATCH
LATCH SWITCH
Be careful not to damage
the latch switch. Discon-
nect the latch switch
connector.
LATCH SWITCH

CONNECTOR

MOUNTING BOLTS
*6 x 1.0 mm
10 N·m (1.0 kg-m, 7.2 lb-ft)
REAR HATCH
OPENER CABLE
Disconnect the rear hatch

opener cable.

RELEASE HANDLE

Pull out the retainer clip.

then remove the release

handle and rear aide trim

panel.

FUEL LID
After installing, check tor

a flush fit with the body.

REAR SIDE TRIM PANEL

Removal
,
see page 20-38

Fuel Lid Opener/Latch:

MOUNTING BOLTS
* 6 x 1.0 mm

10 N·m
(1.0 kg-m,
7.2 Ib-ft)
FUEL LID

OPENER CABLE

MOUNTING BOLTS
*6 x 1.0 mm

13 N·m (1.3 kgm, 9 lb-ft)
FUEL LID LATCH
Lower the rear inner
fender and remove the

fuel lid latch by turning

it
90°.
FUEL LID LATCH
Push and turn the fuel lid
latch to make the fuel lid

fit flush with the body.
FUEL LID

FUEL LID
OPENER CABLE

Replacement, see page 20-67

OPENER

To remove the opener,

pull out the opener knob and

remove the side sill pad

and trim (see page 20-38

OPENER KNOBProCarManuals.com

RETRACTABLE HEADLIGH TCONTROL UNI TINTERLOC K CONTRO LUNIT (A/T )
FUEL PUM P RELA YWire colors : YEL , RED ,BLK/YEL , an d BLK/RE D
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