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.
1997 Geo Metro BaseFACTORY OEM SERVICE PROCEDURE
Using Scan Tool
- Insert a .14" (3.5 mm) feeler gauge between throttle stop screw and throttle lever. See Figure. If Idle Speed Control (ISC) motor plunger is contacting throttle lever screw, bring engine to normal operating temperature.
- Turn engine OFF. Connect scan tool to DLC and turn ignition ON and engine OFF. Using scan tool, read TP sensor voltage. If voltage is not .98-1.02 volts, adjust or replace TP sensor. See ADJUSTMENT. If voltage is .98-1.02 volts, TP sensor is adjusted properly.
Factory Service Tools
Use the Manual With the Right Hardware
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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.