Brad's Car Manuals
: A 3rd party mirror of CHARM + LEMON car manuals
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Ford
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1990
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Bronco II RWD, Standard, M5OD-R1
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes
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Test H - Fuel Control
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Code 86
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Code 65
Code 65
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Check for faulty HEGO signal (Signal or Ground circuit).