1990 Acura Integra Repair Manual

The 1990 Acura Integra is a compact sports sedan featuring a 1.8L DOHC 16-valve four-cylinder engine, front-wheel drive, 5-speed manual or 4-speed automatic transmission, double wishbone suspension, and advanced electronic fuel injection. This repair manual covers comprehensive maintenance procedures, troubleshooting guides, specifications, and step-by-step repair instructions for all major systems including engine, transmission, brakes, suspension, electrical, and body components.

1. Vehicle Specifications 2. Maintenance Schedule 3. Engine Repair 4. Transmission Service 5. Brake System 6. Suspension & Steering 7. Electrical System 8. Cooling System 9. Fuel System 10. Body & Interior 11. Troubleshooting Guide

Vehicle Specifications

Complete technical specifications for the 1990 Acura Integra models including engine, dimensions, capacities, and performance data.

Specification	Details
Engine Type	1.8L DOHC 16-valve inline-4
Displacement	1834 cc
Horsepower	130 hp @ 6300 rpm
Torque	121 lb-ft @ 5000 rpm
Transmission	5-speed manual / 4-speed automatic
Fuel System	Multi-point fuel injection
Brakes Front	Ventilated discs
Brakes Rear	Drum brakes
Wheelbase	99.2 inches
Curb Weight	2580 lbs

Maintenance Schedule

Recommended maintenance intervals and service procedures for optimal vehicle performance and longevity.

Oil Change: Every 3,000 miles or 3 months
Oil Filter: Replace with every oil change
Air Filter: Inspect every 15,000 miles, replace as needed
Spark Plugs: Replace every 30,000 miles
Timing Belt: Replace every 60,000 miles
Coolant Flush: Every 30,000 miles or 2 years
Brake Fluid: Replace every 2 years
Transmission Fluid: Manual - 30,000 miles; Automatic - 15,000 miles

WARNING! Always use manufacturer-recommended fluids and follow torque specifications precisely.

Engine Repair

Comprehensive engine service procedures including timing belt replacement, valve adjustment, and component repair.

Timing Belt Replacement: Align timing marks, remove covers, replace belt and tensioner
Valve Adjustment: Cold engine procedure with feeler gauges
Compression Test: Remove spark plugs, test each cylinder
Oil Pump Service: Remove and inspect for wear
Head Gasket Replacement: Complete cylinder head removal procedure

CAUTION! Engine components are under tension; use proper safety procedures.

Transmission Service

Manual Transmission: Fluid capacity 2.1 quarts, 10W-30 or 10W-40 motor oil
Automatic Transmission: Fluid capacity 6.9 quarts, Honda ATF
Clutch Replacement: Pedal free play 0.4-0.8 inches, disc inspection
Shift Linkage: Adjustment procedures for precise shifting
Differential: Service and fluid specifications
CV Joints: Boot inspection and replacement procedures
Transmission Removal: Step-by-step removal and installation

Brake System

Complete brake system maintenance including disc brake service, drum brake adjustment, and hydraulic system repair.

Front Brakes: Disc diameter 10.2 inches, minimum thickness 0.87 inches. Rear Brakes: Drum diameter 7.9 inches, maximum diameter 7.97 inches.

Brake Pad Replacement: Remove caliper, compress piston, install new pads. Brake Bleeding: Sequence - RR, LR, RF, LF. Master Cylinder: Bench bleeding procedure. Parking Brake: Cable adjustment at equalizer.

Suspension & Steering

Front and rear suspension service including strut replacement, ball joint inspection, and alignment specifications.

Front Strut Replacement: Support vehicle, remove components, install new strut assembly
Ball Joint Inspection: Check for play and boot condition
Tie Rod Ends: Replacement and adjustment procedures
Wheel Bearing: Adjustment and replacement
Alignment Specifications: Camber, caster, and toe settings

Tip: Always use proper jack stands and safety equipment when working under vehicle.

Electrical System

Wiring diagrams, component testing, and electrical system troubleshooting for all vehicle systems.

Battery: 12V 45AH, specific gravity 1.260-1.280
Alternator: Output 70A, voltage regulation 13.9-15.1V
Starter: Draw test specifications and replacement
Fuse Box: Location and amperage ratings
Lighting Systems: Headlight adjustment, bulb replacement
Instrument Cluster: Gauge testing and repair
Wiring Harness: Routing diagrams and connector locations

WARNING! Disconnect battery before performing electrical work to prevent shorts.

Cooling System

Radiator service, thermostat replacement, water pump repair, and cooling system maintenance procedures.

Fuel System

Fuel injection system service, fuel pump replacement, filter service, and emission control systems.

CAUTION! Relieve fuel pressure before opening fuel system components.

Body & Interior

Body panel repair, interior component service, glass replacement, and trim installation procedures.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel pump, ignition, battery	Check fuel pressure, spark, battery voltage
Poor acceleration	Fuel filter, air filter, timing	Replace filters, check ignition timing
Brake vibration	Warped rotors, worn pads	Resurface or replace rotors, install new pads
Steering pull	Alignment, tire pressure	Perform alignment, check tire pressures
Electrical issues	Ground connections, fuses	Clean grounds, check all fuses and relays

Reset: Disconnect battery for 10 minutes to reset ECU if needed.

Service: Contact Acura dealer or certified technician for complex repairs.