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
Fast Idle Operation
- Engine and throttle body must be at temperature of 77°F (25°C) prior to checking. Check that matching mark on fast idle cam is aligned with center of cam roller. See Fig 1 .
- If alignment of marks is required, rotate cam adjusting screw until alignment is obtained. Once correct mark alignment is obtained, check clearance between primary throttle valve and throttle bore wall. Clearance should be .016-.020" (.41-.51 mm). Adjust clearance with fast idle adjusting screw. See Fig 1 .
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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