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 MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDESCRIPTION AND OPERATION
1991 Hyundai Sonata V6-3.0L
Ignition System: Description and Operation
1991 Hyundai Sonata V6-3.0LSECTION Description and Operation
Ignition System:
Ignition timing is controlled by the electronic control unit (ECU). The standard reference ignition timing data (preset values) for the engine operation conditions are programmed in the memory of the (ECU).
The engine conditions (rpm, load warm-up condition, etc.) are detected by the various sensors. Based upon these sensor signals and the ignition timing standard reference data, signals to interrupt the primary current of the ignition coil are sent to the power transistor. The timing is controlled by the ECU through the power transistor in this manner.
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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.