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 Geo Storm Base, Automatic, JF-403EFACTORY OEM SERVICE PROCEDURE
Pick-Up Coil
- Remove distributor cap and rotor. Unplug pick-up coil connector from distributor module. Measure resistance between terminals. See Figure . Replace pick-up coil if resistance is not as specified in PICK-UP COIL RESISTANCE table.
- If resistance is within specification, check pick-up coil air gap and adjust as necessary. See PICK-UP COIL AIR GAP table. Replace distributor if air gap specification cannot be obtained.
PICK-UP COIL AIR GAP (1)
| Application | Clearance In. (mm) | ||
|---|---|---|---|
| All Models | .008-.016 (.20-.40) | ||
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PICK-UP COIL RESISTANCE - Ohms @ 68°F (20°C)
| Application | Ohms |
|---|---|
| Storm | 500-1500 |
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.