ACURA NSX 1991 Service Repair Manual

R = Replace I = Inspect After inspection, clean, adjust, repair or replace if necessary.

NOTES
SEC
&

PAGE

Severe Driving Conditions Items with an orin the chart will need service more often, if you
drive in some severe conditions.
The conditions are:
A. Repeated short distance driving.
B. Dusty conditions.
C. Severe cold weather.
D. Areas with road salt or other corrosive materials.
E. Rough or muddy roads. The services are:
Clean the air cleaner element every 7,500 miles (12,000 km) or 6 months and replace every
30,000 miles (48,000 km) or 24 months under condition B or E. Replace engine oil and oil filter every 3,750 miles (6,000 km) or 3 months under condition A
or B.
Inspect front and rear brake discs and calipers, and rear brake pads every 7,500 miles (12,000 km) or 6 months under condition A, B, D, or E.
Inspect the power steering system every 7,500 miles (12,000 km) or 6 month under condi-
tion B, C, or E. 6-23 ('91-'93)10-11
11-127
9-4
19-6
19-10
19-20
19-18
19-26
19-4
19-62
19-69
19-41
19-43
19-44
19-62
18-6
17-21 ('91-'93)
17-30 ('91-'93)
17-31 ('91-'93)

18-14,
30
ProCarManuals.com

Oil Level

Engine Oil

Inspection
Replacement

1. Check engine oil with the engine off and the car parked on level ground.
2. Make certain that the oil level indicated on the dipstick is between the upper and lower marks.
3. If the level has dropped close to the lower mark, add oil until it reaches the upper mark.

CAUTION: Insert the dipstick carefully to avoid

bending it.
1. Warm up the engine.
2. Drain the engine oil.

WASHER
Replace.

OIL PAN DRAIN PLUG

45 N·m (4.5 kg-m, 33 Ib-ft)

DIPSTICK

UPPER
LOWER

3. Reinstall the drain plug with a new washer, and
refill with the recommended oil.

Engine Oil Viscosity for Outside Temperature Ranges.
NOTE: Oil filter should be replaced at each oil
change.ProCarManuals.com

Special Tools
Special Tools Page Reference
11-44, 114,

118, 120, 129,
137,
140

11-21, 32, 37
11-21

11-131

11-21

11-139, 140

11-88

Tool Number

A973X-041-XXXXX

KS-AHM-32-003

07LAJ-PT3010A

07LAJ-PT30200

07MAJ-PR70100

07JAZ-001000A

07406-0040001ProCarManuals.com

Component Locations

Index
FRONT KNOCK SENSOR
Troubleshooting, page 11-62
COOLANT TEMPERATURE (TW) SENSOR

Troubleshooting, page 11 - 48

EGR VALVE

Troubleshooting,
page 11-128
FUEL PUMP RESISTOR

Inspection, page 11-106

CRANK/CYL SENSOR

Troubleshooting, page 11-46

CONTROL BOX
page 11-6 THROTTLE

ANGLE

SENSOR

Troubleshooting,
page 11-50
FAST IDLE VALVE

Inspection, page 11-83

EACV

Troubleshooting,

page 11-70 INJECTOR
RESISTOR

Testing, page 11-94

FRONT HEATED
OXYGEN (O2) SENSOR

Troubleshooting, page 11-32

INTAKE AIR TEMPERATURE
(TA) SENSOR

Troubleshooting, page 11-52

REAR KNOCK SENSOR

Troubleshooting, page 11 -62

REAR HEATED
OXYGEN (O2) SENSOR

Troubleshooting, page 11 -32

MAIN RELAY
Relay Testing, page 11-104

Inspection, page 11-105

ELECTRONIC CONTROL UNIT (ECU)

Troubleshooting, page 11-26
FUEL PUMP RELAY

Inspection, page 11-99ProCarManuals.com

Component Locations

Index

THROTTLE CABLEInspection/Adjustment, page 11-113

Installation, page 11-113

THROTTLE BODY

Inspection, page 11-114

Disassembly, page 11-116
AIR CLEANER

Disassembly,

page 11-112
AIR INTAKE
DUCT
FUEL PUMP

Troubleshooting, page 11-99

Testing, page 11-102
Replacement, page 11-102

FUEL FEED PIPE
FUEL CUT VALVES FUEL FILTER

Replacement, page 11-97

PRESSURE REGULATOR

Testing, page 11-95

Replacement, page 11-96

TWO-WAY VALVE

Testing, page 11-140

FUEL RETURN PIPE
FUEL FILLER CAP
CHARCOAL CANISTER
Troubleshooting, page 11-137
FUEL INJECTORS

Troubleshooting,

page 11-89

Replacement, page 11-92

FUEL PIPE
FUEL TANK

Replacement,

page 11-108

FUEL VAPOR HOSEProCarManuals.com

System Description
Vacuum Connections
CONTROL

BOX

page 11-6

PURGE CONTROL
DIAPHRAGM
CHARCOAL
CANISTER
TO TWO-WAY
VALVE
CHAMBER
VOLUME
CONTROL
DIAPHRAGM

DASHPOT

DIAPHRAGMEGR VALVE FRONT OF
VEHICLE
EGR VALVE LIFT SENSOR
FUEL PRESSURE
REGULATOR

(cont'd)ProCarManuals.com

System Description

Vacuum Connections (cont'd)
Control Box
PURGE CUT-OFF
SOLENOID VALVE
Troubleshooting, page 11-137 CONSTANT VACUUM CONTROL (CVC)

VALVE

Troubleshooting, page 11-128

EGR CONTROL

SOLENOID VALVE

Troubleshooting,

page 11-128 MANIFOLD ABSOLUTE
PRESSURE (MAP) SENSOR

Troubleshooting, page 11-40

CHAMBER
VOLUME
CONTROL
SOLENOID

VALVE

Troubleshooting,

page 11-120
AIR CHAMBERProCarManuals.com

CHECK VALVE

AIR CHAMBER

CHAMBER VOLUME CONTROL SOLENOID VALVE

CHAMBER VOLUME CONTROL DIAPHRAGM

PCV VALVE

EGR VALVE

CONSTANT VACUUM CONTROL (CVC) VALVE

EGR CONTROL SOLENOID VALVE

CHARCOAL CANISTER

PURGE CUT-OFF SOLENOID VALVE

PURGE CONTROL DIAPHRAGM VALVE

TWO-WAY VALVE
FRONT OXYGEN (O2) SENSOR

REAR OXYGEN (O2) SENSOR

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR

ELECTRONIC AIR CONTROL VALVE (EACV)

FAST IDLE VALVE

AIR CLEANER

FUEL INJECTOR

PRESSURE REGULATOR

FUEL FILTER

FUEL PUMP

FUEL TANK

DASHPOT DIAPHRAGM

DASHPOT CHECK VALVEProCarManuals.com

System Description

Electrical ConnectionsProCarManuals.com

(cont'd)

TERMINAL LOCATIONProCarManuals.com