Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Mazda B2200 Base, 2D PickupFACTORY OEM SERVICE PROCEDURE
Coasting Richer System
- Connect voltmeter to terminal "H" (Brown/Black wire) of carburetor connector. See Figure . Increase engine speed to 3000 RPM. Lift idle switch arm. See Figure .
- With engine speed greater than 2500 RPM, voltmeter should read 12 volts. With engine speed 1400-2500 RPM, voltmeter should read less than 1.5 volt. With engine speed less than 1400 RPM, voltmeter should read 12 volts.
- If voltmeter readings are not as specified, check ECU connector terminal 2H and coasting richer solenoid valve.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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