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.

1992 Infiniti G20 AutomaticFACTORY OEM SERVICE PROCEDURE

Idle Speed

IDLE SPEED SPECIFICATIONS ⁽¹⁾

Application

RPM

G20

⁽¹⁾ 700-800

M30

⁽²⁾ 750-850

Q45

⁽²⁾ 600-700

⁽¹⁾	With Consult Tester (J-38465) in IGN TIMING ADJ in WORK SUPPORT mode or with throttle position sensor harness connector disconnected (A/T in Neutral). Adjust idle speed by turning adjustment screw on AAC valve.

⁽²⁾

With Consult Tester (J-38465) in DATA MONITOR mode or with transmission in Neutral and no load on engine. Adjust idle speed by selecting AAC VALVE ADJ in WORK SUPPORT mode or by disconnecting AAC valve harness connector. Turn adjustment screw on AAC valve. Adjust idle speed to 700 RPM on M30 and 575-625 RPM on Q45.

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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