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.
1990 Mazda RX-7 GTU, AutomaticFACTORY OEM SERVICE PROCEDURE
Anti-AFTERBURN Valve
- Operate engine to normal operating temperature. With engine idling, disconnect air control valve-to-air pump hose at air pump. Place finger over opening and ensure air is not drawn into the air hose.
- Accelerate engine to greater than 3000 RPM and then rapidly decrease engine speed. Note that air is drawn into air hose for a few seconds during deceleration. Replace air control valve if anti-afterburn valve did not operate correctly.
Factory Service Tools
Use the Manual With the Right Hardware
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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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