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.
C(3)I Ignition Module
The ignition module monitors input signals from several engine sensors. It then passes this information to the ECM so that correct spark and fuel injector timing can be maintained. Below 400 RPM, the module controls spark advance by triggering each of the 3 coils at a pre-determined interval based on engine speed only. Above 400 RPM, the ECM controls the EST and compensates for all driving conditions. The ignition module is located directly below coil pack, on top of engine.
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.