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 37 (2.9L EFI EEC IV TESTING)
1985 Ford Bronco 5.8 G, Standard, TOD
Section 37 (2.9L EFI EEC IV Testing)
1985 Ford Bronco 5.8 G, Standard, TODSECTION Section 37 (2.9L EFI EEC IV Testing)
WARNING: This page is about a different car, the 1986 Ford Ranger, 1986 Ford Cab & Chassis, and 1986 Ford Bronco II. However, it is still accessible from the selected car via links, so may be relevant.
- Self-Diagnostics
- Quick Tests
- Circuit Tests
- Notes
- Test A - No Start
- Test B - Vehicle Battery
- Test C - Reference Voltage
- Test D - Act Sensor
- Test F - Coolant Temperature Sensor
- Test G - Map/BP Sensor (Manifold Absolute Pressure/Barometric Pressure Sensor
- Test H - Knock Sensor
- Test I - Throttle Position Sensor (TPS)
- Test J - Pressure Feedback EGR (PFE) & EGR Valve Regulator (EVR)
- Test M - Neutral A/C Switch Input
- Test N - Key Power Check
- Test O - Brake On/Off (Boo) Switch
- Test P - Power Steering Pressure Switch (PSPS)
- Test Q - 5.0L EFI Fuel Control
- Test R - 2.3L EFI Fuel Control
- Test S - Fuel Control
- Test T - Fuel Pump Circuit (Inertia Switch)
- Test U - EGR On/Off Check
- Test V - Air Management System
- Test W - Canister Purge (CANP) Check
- Test X - Idle Speed Control (By-Pass Air)
- Test BB - Shift Indicator Light (SIL)
- Test Cc - Wide Open Throttle A/C Cut-Out (WAC), A/C Demand
- Test Dd - Converter Clutch Override CCO
- Test Ee - Dynamic Response Test
- Test Ff - Ignition Diagnostic Monitor (IDM)
- Test GG - Spark Timing Check
- Test HH - No Codes/Codes Not Listed
- Test II - System Check
- Test JJ - Erratic Ignition
- Test KK - AXOD Transaxle
- DRIVEABILITY Test
- Map/BP Specification
- Wiring Diagrams
RENDER: 1.0x
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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.