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.
MARELLI Electronic Ignition: Description
The Marelli electronic ignition system consists of an ignition coil, electronic control module, and a breakerless distributor. See Figure. The control module and ignition coil are mounted on a finned, cast aluminum base which not only cools the units, but also provides a system ground. See Figure. Marelli distributors are equipped with centrifugal and vacuum advance mechanisms. A 4-tooth reluctor is mounted on distributor shaft and combines with the pickup coil assembly to provide control module with electrical signals. Control module analyzes the electrical signals from the distributor pickup coil assembly and provides the coil with proper dwell time and spark timing regardless of engine speed. The control module's current limiter provides a constant current flow to the primary circuit, preventing coil damage.
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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.