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, StandardFACTORY OEM SERVICE PROCEDURE
Switching Solenoid Valve (Non-Turbo) Signal Check
- Warm engine to normal operating temperature and let idle. Connect tachometer to engine. Disconnect vacuum hose connecting the switching solenoid valve to the air control valve at the switching solenoid valve. Place finger over port.
- Slowly increase engine speed, checking that air is sucked into the port. Disconnect throttle sensor connector. Slowly increase engine speed, checking that air is not sucked into the port when speed is more than 1000-1200 RPM.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.