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.
Spark Combustion Computer
On Calif, vehicles and Federal 318" 4-barrel V8 engines, a spark combustion computer is used. This computer not only has a 10 pin dual connector, but also a 6 pin single connector (3 pins blank on 4-cylinder, 2 pins blank on others). The combustion computer controls ignition system and air/fuel ratio of carburetor.
Electronic Spark Advance system is new in 1980, determining spark advance by speed and vacuum only. Start timer, vacuum transducer count-up clock and memory, throttle transducer, and ambient air temperature sensor features used on previous models are not used in 1980.
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.
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