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Ford
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1981
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Bronco 4.9L Eng VIN E, Trans Mfr CD SR
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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MCU Engine Control System
MCU Engine Control System
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Description
Operation
Microprocessor Control Unit (MCU)
Engine Sensors
Coolant Temperature
Engine Load Sensor
Oxygen Sensor
Engine Speed
Knock Sensor
Self-Test Connector
Engine Controls
Notes
Thermactor Controls
Air/Fuel Controls
Canister Purge Solenoid
Diagnosis & Testing
Notes
Equipment Required
Preparation For Testing
Functional Test
Notes
Key On, Engine Off Test
Engine Running Test
Non-Code Tests
Notes
Canister Purge Check
Spark Retard Solenoid Check
Cold Drive Complaint
Closed or Light Throttle Drive Complaint
Instructions For Using Sub-Routine Tests
Sub-Routines