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.
Electronic Lean Burn: Description: Notes
Starting in 1979, the Electronic Lean Burn (ELB) ignition system became known as the Electronic Spark Control (ESC) system. The system is governed by the Spark Control Computer (SCC) and various engine sensors. The function of this system is to provide a method for burning a lean air/fuel mixture. See Fig 1.
In addition, the ESC system was used on 1979 Aspen and Volare models with 225" 6-cylinder California engines as part of a total emission system called Electronic Feedback Carburetor (EFC) system.
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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.