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.
Cold DRIVEABILITY Test 8 - Secondary Ignition Check
Turn all lights and accessories off. Connect a suitable engine analyzer to the engine. Start engine. Check secondary ignition pattern. Check ignition coil output. Open circuit secondary ignition voltage should be at least 25,000 volts. If scope pattern is okay, proceed to COLD DRIVEABILITY TEST 9 . Repair secondary ignition as necessary.
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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.