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 DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM5.0L/5.8L FEEDBACK CARBURETOR TESTS W/CODES
1985 Ford Bronco 5.8 G, Standard, TOD
5.0L/5.8L Feedback Carburetor Tests W/Codes
1985 Ford Bronco 5.8 G, Standard, TODSECTION 5.0L/5.8L Feedback Carburetor Tests W/Codes
- Diagnosis & Testing
- Quick Tests
- Key On-Engine Off (KOEO) Self-Test
- Code/Test Menus (KOEO)
- Timing Check
- Key On/Engine Running (KOER) Self-Test
- Code/Test Menu (KOER)
- Continuous Test
- Continuous Monitor (Wiggle) Test
- Code/Test Menu (Continuous)
- How To Use Circuit Tests
- Test A - No Start
- Test B - Vehicle Battery
- Test C - Reference Voltage
- Test D - No/Wrong Codes
- Test E - Coolant Temperature Sensor
- Test F - Manifold Absolute Pressure/Barometric Pressure (Map/BP) Sens
- Test G - Throttle Position Sensor (TPS)
- Test I - FBC Fuel Control
- Test K - (Dc Motor) Idle Speed Control (ISC Dc Motor)
- Test L - Canister Purge Test
- Test M - Air Charge Temperature (Act) Sensor
- Test O - Air Management System
- Test P - EGR Vent (EGRV) & EGR Control (EGRC) Valve Output Circuit Check
- Test R - Temperature Compensated Pump (TCP) Output Circuit Check
- Test S - Variable Voltage Choke (VVC) Output Circuit Check
- Test T - Spark Timing Check
- Test V - THERMACTOR Output Circuit Check
- Test W - Dynamic Response Test
- Test X - Diagnosis By Symptom
- Test Z - Key Power Test
- Test Aa - Variable Voltage Choke (VVC) Test
- Test BB - Temperature Compensated Accelerator Pump (TCP) Test
- Test Cc - Converter Clutch Override (CCO)
- Test Dd - EGR Valve Position (EVP) Sensor
- Test Ee - Brake On/Off (Boo)
- Test Ff - Erratic Ignition
- Test GG - Ignition Diagnostic Monitor (IDM)
- Test HH - EGR On/Off Control
- Test II - Wot A/C Cutoff (WAC) A/C Demand
- Wiring Diagrams
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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.