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.
1972 MAZDA Piston Engine Modification: Description
The exhaust emission control system on all except 808 models consists of a throttle opener, which controls throttle during deceleration; an ignition control system, which regulates advance and retard of ignition; and a slow fuel cut valve, which prevents dieseling when ignition is turned off. 808 models, with manual transmission, use only the throttle positioner, while 808 automatic transmission California cars use a throttle positioner and a vacuum switch connected to intake manifold. Non-California 808 automatic transmission models require no special equipment to meet exhaust emission regulations.
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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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