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 MANUALSFORD1985BRONCO 5.8 G, STANDARD, TODREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (EEC IV THEORY/OPERATION)
1985 Ford Bronco 5.8 G, Standard, TOD
Section 33 (EEC IV Theory/Operation)
1985 Ford Bronco 5.8 G, Standard, TODSECTION Section 33 (EEC IV Theory/Operation)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1984 Ford Ranger, 1984 Ford RV Cutaway, 1984 Ford Pickup, 1984 Ford Econoline, and 1984 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Description
- Operation
- Notes
- Inputs
- Air Charge Temperature (ACT) Sensor (2.8L Models Only)
- A/C Compressor Clutch Signal (ACC)
- EGR Valve Position Sensor (All Except 4.9L Models)
- Engine Coolant Temperature (ECT) Sensor
- Idle Tracking Switch (ITS) (2.8L & 4.9L Models Only)
- Key Power
- Knock Sensor (2.8L Models Only)
- Manifold Absolute Pressure (MAP) Sensor
- Oxygen Sensor
- Park/Neutral Switch
- Profile Ignition Pick-Up (PIP)
- Self-Test Input
- Throttle Position Sensor (TPS)
- Outputs
- EEC Power Relay
- Canister Purge Solenoid
- EGR Control Solenoid
- EGR Shut-Off Solenoid
- EGR Vent Solenoid
- Feedback Control Solenoid (FCS)
- Idle Speed Control (ISC) Motor
- Self-Test Output
- Shift Indicator Lamp (2.8L & 4.9L Models Only)
- TFI Ignition Module
- Thermactor Air By-Pass (TAB) Solenoid
- Thermactor Air Diverter (TAD) Solenoid
- Throttle Kicker Solenoid
- Variable Voltage Choke (VVC) (2.8L Models Only)
- Temperature Compensated Accelerator Pump (TCP) (2.8L Only)
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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.