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.
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HOMESERVICE MANUALSMAZDA1991RX-7 BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSIDLE CONTROL SYSTEMBASE THROTTLE OPENING ANGLE (THROTTLE BODY)
1991 Mazda RX-7 Base, 2D Coupe, Automatic
Base Throttle Opening Angle (Throttle Body)
1991 Mazda RX-7 Base, 2D Coupe, AutomaticSECTION Base Throttle Opening Angle (Throttle Body)
- No. 1 secondary throttle valve starts to open when primary valve opens to proper angle. See Fig 1 . Primary throttle valve should be completely open when secondary valve fully opens.
- Check clearance between primary throttle valve and throttle bore wall when No. 1 secondary valve starts to open. Clearance should be within specification. See PRIMARY THROTTLE VALVE CLEARANCE table. If clearance is not within specification, bend tab until proper clearance is obtained. See Fig 2 .
PRIMARY THROTTLE VALVE CLEARANCE
| Application | In. (mm) | |
|---|---|---|
| Non-Turbo | ||
| A/T | .03-.06 (0.8-1.5) | |
| M/T | .02-.03 (0.5-0.7) | |
| Turbo | .04-.07 (1.0-1.7) | |
RENDER: 1.0x
NO RELATED
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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.