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
Throttle Diaphragm
- On M/T models, disconnect hose at throttle diaphragm. Using vacuum pump, apply at least 7.8 in. Hg to throttle diaphragm. See Fig 1 .
- Ensure that No. 2 secondary throttle valve is fully open. On A/T models, disconnect hose from double throttle diaphragm. Using vacuum pump, apply 18.1 in. Hg to No. 2 secondary double throttle diaphragm. See Fig 1 .
- With vacuum applied, check clearance between No. 2 secondary throttle valve and throttle bore wall when primary throttle valve is closed. Clearance should be .09-.13" (2.3-3.3 mm).
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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