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 Spark Control System: Description: Sensors: Notes
Vehicles equipped with Electronic Spark Control Computer use 4 sensors on 4 and 6 cylinder engines, 5 sensors on V8 engines. The sensors are; pick-up coil assembly (Hall Effect type on 4 cylinder engines), coolant temperature switch, carburetor switch, vacuum transducer and detonation sensor (Calif. V8 engines only).
Vehicles equipped with Electronic Spark Combustion Computer use 8 sensors. The sensors are; pick-up coil assembly (single or dual pick-up), coolant temperature switch, carburetor switch, vacuum transducer, detonation sensor (Calif. V8 engines only), oxygen sensor, speed sensor and charge temperature switch. Functions of sensors are as follows:
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.