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 Prizm LSi, 4D Hatchback, StandardFACTORY OEM SERVICE PROCEDURE

Pick-Up Coil

Measure pick-up coil resistance between terminals No. 2 and No. 3. See Fig 1 . If resistance is not within specification, replace distributor. See PICK-UP COIL RESISTANCE table.
Measure second pick-up coil resistance between terminals No. 1 and No. 3. See Fig 1 . If resistance is not within specification, replace distributor. See PICK-UP COIL RESISTANCE table.
If resistances are within specification, check pick-up coil air gaps and adjust as necessary. Replace distributor if air gap specification cannot be obtained. See PICK-UP COIL AIR GAP table.

Fig 1: Identifying Pick-Up Coil Connector Terminals

Courtesy of GENERAL MOTORS CORP.

PICK-UP COIL AIR GAP ⁽¹⁾

Application

Clearance In. (mm)

All Models

.008-.016 (.20-.40)

⁽¹⁾	Same as crank angle sensor air gap.

PICK-UP COIL RESISTANCE - Ohms @ 68°F (20°C)

Application	Ohms
Prizm	140-180

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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.