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Every control module on the 1980-1986 Ford Bronco — where it lives, replacement time, and what it takes to program a replacement.
Electronic Engine Control (EEC-III/EEC-IV)1.2 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Right side of engine bay, firewall area near brake booster
🔧 Rotunda NGS or KOEO/KOER self-test
⚠️ EEC-III (1980-1983) transitioned to EEC-IV (1984+). Calibration updates require physical PROM/EPROM chip replacement. Self-test via jumper wire to data link connector.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1984 Ford Bronco 300ci I6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.