- Remove carburetor from engine. Clamp carburetor in a vise with idle mixture adjusting screw (MAS) facing up. Protect gasket surface from vise jaws.
- Drill a 5/64" pilot hole in casting surrounding idle mixture adjusting screw. Redrill hole to 1/8". Insert a blunt punch into hole and drive out plug. Reinstall carburetor on engine.
- Warm engine to normal operating temperature. Set idle CO and engine speed to specified value by adjusting idle speed and idle mixture adjusting screws. Idle CO should be .1-.3% at nominal curb idle speed. If CO level is not as specified, check evaporative emission system and catalytic converter.
Contents
Section: Adjustments- Engine Identification
- Engine Compression
- Spark Plugs
- High Tension Wire Resistance
- Jet Valve Clearance
- Valve Adjustment
- Valve Arrangement
- Distributor
- Ignition Timing
- Idle Speed
- Idle Mixture & CO Level
- Cold (fast) Idle Adjustment
- Emission Control
- Ignition Coil
- Feedback Carburetor System
- Battery
- Starter
- Alternator
- Alternator Regulator
- Belt Adjustment
- Service Intervals
- Capacities
- Abbreviations
- Adjustments
- Application
- Automatic Trans
- Auxiliary Emission Control Systems
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling Fan
- Cooling System (mechanical)
- Driveline/axles
- Electrical
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Heater
- Identification
- Ignition System
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- MAP Guidelines
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Procedures
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Steering Gear
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Timing Belt
- Traction Control Disable
- Transmission
- Wheel Alignment
- Wiper/washer Systems
