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.
1989 Mazda RX-7 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Sub-Zero Starting Assist
- Ensure fluid supply tank contains adequate amount of fluid. Disconnect "S" terminal connector from starter motor. Remove starting fluid valve from intake manifold.
- Turn ignition switch to "START" position. Note that no fluid is sprayed from valve with ambient temperature above -4°F (-20°C). Disconnect connector from oil thermo unit located on the oil pan.
- Touch connector to ground. Turn ignition switch to "START" position. Push air bleed button on air tank. Check that fluid is sprayed from the valve. If fluid is sprayed, check oil thermo unit.
- Using ohmmeter, check for continuity at oil thermo unit terminals. Replace thermo unit if continuity did not exist at specified temperature. See OIL THERMO UNIT CONTINUITY table.
OIL THERMO UNIT CONTINUITY
| Temperature | Continuity |
|---|---|
| Above 3.2°F (-16°C) | No |
| Below 3.2°F (-16°C) | Yes |
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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