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.
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HOMESERVICE MANUALSPONTIAC1990GRAND PRIX STE, 3.1 VREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGBASIC IGNITION SYSTEM CHECKSDISIGNITION COIL RESISTANCE
1990 Pontiac Grand Prix STE, 3.1 V
Ignition Coil Resistance
1990 Pontiac Grand Prix STE, 3.1 VSECTION Ignition Coil Resistance
- Disconnect leads from ignition coil. Using an ohmmeter, check secondary ignition coil resistance. See DIS SECONDARY COIL RESISTANCE table.
- Primary resistance and secondary resistance values on models not listed in DIS SECONDARY COIL RESISTANCE table are not supplied by manufacturer.
DIS SECONDARY COIL RESISTANCE
| Application | Resistance |
|---|---|
| Beretta & Corsica (2.2L & 3.1L) | 5000-10,000 |
| Cavalier (2.2L) | 5000-10,000 |
| Century (2.5L) | 5000-10,000 |
| Cutlass Calais, Grand Am & Skylark (2.5L) | 5000-10,000 |
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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.