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Home >> Ford >> 1984 >> Bronco 5.0 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 5.0L/5.8L EEC IV Testing >> Quick Test >> Key On-Engine Running (KOER) Self-Test
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Key On-Engine Running (KOER) Self-Test

This test checks sensors under actual operating conditions and at normal operating temperature. Any faults must be present at time of test to be detected.

NOTE: If engine will not start, perform TEST A  .