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 RX-7 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
System Inspection: Non-Turbo
- Warm engine to normal operating temperature and turn off. Disconnect intake air temperature sensor connector. Connect a 2000-3000 ohm resister to terminals of sensor connector. See Fig 1 .
- Connect tachometer and start engine. Check that engine speed is about 800 RPM for 90 seconds and about 750 RPM after 90 seconds.
- Turn engine off and disconnect vacuum hose from pressure regulator. See Fig 2 .
- Place finger on vacuum hose port and start engine. Check that for 90 seconds air is not pulled into port. After 90 seconds, air should be pulled into port.
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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