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 MANUALSPONTIAC1987GRAND PRIX LE, 5.0 HREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - V6TESTINGIGNITION COIL RESISTANCE (OHMS)
1987 Pontiac Grand Prix LE, 5.0 H
Ignition Coil Resistance (Ohms)
1987 Pontiac Grand Prix LE, 5.0 HSECTION Ignition Coil Resistance (Ohms)
NOTE:
Procedures and specifications for 3.0L (VIN L) and 3.8L (VIN B, 3 & 7) engines are not available from the manufacturer.
- Connect ohmmeter between ignition coil primary and coil frame. Reading should be infinite on high scale of meter. Disconnect ohmmeter from coil frame and connect it to the other coil primary terminal. Reading should be very low or zero on low scale of meter.
- Disconnect ohmmeter lead from one of the coil primary terminals and connect it to coil secondary terminal. Reading should not be infinite on high scale of meter.
NOTE:
For more information on ignition system, see DELCO-REMY COMPUTER CONTROLLED COIL IGNITION or DELCO-REMY ELECTRONIC SPARK TIMING (EST) IGNITION in ELECTRICAL section.
RENDER: 1.0x
NO RELATED
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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.