Mazda B1600, B1800, B2000, Cab Plus, B2000 SE-5, B2000 LX, B2200 Repair Manual 1972-1986

• Mazda B1600
• Mazda B1800
• Mazda B2000
• Mazda Cab Plus
• Mazda B2000 SE-5
• Mazda B2000 LX
• Mazda B2200
• Mazda Rotary

IDLE MIXTURE | GASOLINE ENGINES

If for some reason (tampering or carburetor overhaul) the mixture needs adjustment, use the following procedures. Two procedures are given; one for a HC/CO analyzer and one for a fuel flow meter.

FUEL FLOW METER

It is best to use this procedure to set the idle and throttle screws after they have been disturbed. After you are finished, check the adjustment with a HC/CO analyzer.

1. Adjust the throttle angle opening to specifications with the throttle adjustment screw. The adjustment should be made from the fully closed position. Tighten the locknut after the adjustment is complete.



2. Connect a fuel flow meter.



3. Start the engine and set the approximate idle speed with the idle air screw.



4. Adjust the idle fuel flow to specifications with the idle fuel screw.



5. Use the idle air screw to set the idle speed again.



6. Repeat this procedure (Steps 4 and 5) until both the idle fuel flow and the idle speed are within specifications.



7. Disconnect the fuel flow meter.

1. If you have not already done so, adjust the throttle angle opening to specifications. Make the adjustment from the fully closed position.



2. Lock the nut after adjustment.



3. Start the engine and adjust the idle speed with the idle air screw.



4. Using the gas analyzer, check the HC (hydrocarbon) and CO (carbon monoxide) readings. If the HC is less than 200 ppm (parts per million) and the CO is between 0.1-2.0%, no further adjustment is needed.



5. If the HC and CO are not within specifications, adjust the CO reading to as close to 0.1% as possible, keeping the HC reading below 200 ppm. Use the idle fuel screw to make this adjustment.

COMBINATION SWITCH

The combination turn signal, windshield wiper, and headlight switch is mounted on the steering column, and must be replaced as an assembly.

REMOVAL AND INSTALLATION

1. Disconnect the negative battery cable.



2. Remove the steering wheel.



3. Remove the "Lights-Hazard" Indicator and the steering column shroud.



4. Unplug the electrical multiple connectors at the base of the steering column.



5. Pull the headlight knob from its shaft.



6. Remove the snap ring, which retains the switch, from the steering shaft. Pull the turn indicator cancelling cam from the shaft.



7. Remove the single retaining bolt near the bottom of the switch. Remove the complete switch from the column.



8. Installation is the reverse of removal. Check the operation of the switch before installing the steering wheel.

• Tune-up and routine maintenance
• Engine and overhaul procedures
• Cooling, heating and air-conditioning systems
• Fuel and exhaust systems
• Engine electrical systems
• Emissions control systems
• Transmission
• Brakes
• Suspension and steering systems
• Body
• Chassis electrical system
• Wiring diagrams