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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1991RX-7 BASE, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSIDLE CONTROL SYSTEMDOUBLE THROTTLE DIAPHRAGM (NON-TURBO)
1991 Mazda RX-7 Base, 2D Convertible, Standard
Double Throttle Diaphragm (Non-Turbo)
1991 Mazda RX-7 Base, 2D Convertible, StandardSECTION Double Throttle Diaphragm (Non-Turbo)
- On M/T models, disconnect hose at double throttle diaphragm. Using vacuum pump, apply at least 7.8 in. Hg to throttle diaphragm. See Fig 1 . Ensure No. 2 secondary throttle valve is fully closed.
- 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" (2.2-3.2 mm).
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.