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.
Ignition System: Notes
All vehicles are equipped with a high energy ignition system capable of producing in excess of 50,000 volts. Vehicles except those using the Opti-Spark system (Corvette), C3I system (3.3L and 3.8L), IDI system (2.3L) or DIS (1.9L, 2.0L, 2.2L, 2.5L, 3.4L and some 3.1L) are equipped with a High Energy Ignition Electronic Spark Timing (HEI-EST) distributor.
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.