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 Geo Metro XFiFACTORY OEM SERVICE PROCEDURE
Idle Speed Control Solenoid
- Idle Speed Control (ISC) solenoid is located below left side of air cleaner. ISC solenoid by-passes air around throttle valve and directly into intake manifold. Air is allowed to pass through ISC solenoid when it is energized by the ECM.
- ISC solenoid is energized whenever idle speed drops to less than desired RPM due to engine load (i.e., electrical, P/S, A/T in Drive, etc.). ISC solenoid is also energized each time engine is started or during periods of deceleration to compensate for rich mixtures caused by a fully closed throttle. No other information is available from manufacturer.
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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