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 MANUALSFORD1992TEMPO L4-140 2.3L HSCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDESCRIPTION AND OPERATION
1992 Ford Tempo L4-140 2.3L HSC
Powertrain Management: Description and Operation
1992 Ford Tempo L4-140 2.3L HSCSECTION Description and Operation
PURPOSE
Modern engine management and control systems electronically regulate the air/fuel mixture, idle speed and ignition timing to achieve optimum [1] engine performance.
INFORMATION STRUCTURE
Information in Computer, Fuel, Ignition and Emission Systems is divided into the following four major topics:
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 Controls
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 (PCV) systems, Exhaust Emission controls, Air Injection Systems (AIS), etc.
Fuel Systems
Focuses on systems and components related to fuel and intake air delivery. Does NOT include information regarding electronic engine controls.
Ignition Systems
Focuses on primary and secondary ignition systems and components.
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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.