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 MANUALSCHEVROLET1993CAPRICE WAGON RWD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATION
1993 Chevrolet Caprice Wagon RWD V8-350 5.7L
Computers and Control Systems: Description and Operation
1993 Chevrolet Caprice Wagon RWD V8-350 5.7LSECTION Description and Operation
PURPOSE
Computerized Engine Control Systems electronically regulate the air/fuel mixture, idle speed and ignition timing to achieve optimum [1] engine performance.
INFORMATION STRUCTURE
Information in this section is divided into the following four major sub-headings:
Computers and Control Systems
Addresses the on-board computer system and components as related to engine management. Consult this section for information regarding on-board diagnostics, sensor inputs, computer outputs, etc.
Emission Control Systems
Addresses emission related systems and components only. Includes (but is not limited to) Exhaust Gas Recirculation (EGR) systems, Evaporative Emission (EVAP) systems, Positive Crankcase Ventilation ([1][2]PCV) systems, Exhaust Emission controls, Air Injection Systems (AIS), etc.
Fuel Delivery and Air Induction
Focuses on systems and components related to fuel and intake air delivery. Does NOT include information regarding electronic engine controls.
Ignition System
Focuses on primary and secondary ignition systems and components. Does NOT include information regarding electronic engine controls.
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[1] Optimum performance means the best possible compromise between the demands of high power, low fuel consumption, and the cleanest possible exhaust emissions.
RENDER: 1.0x
NO RELATED
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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.