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Home >> Ford >> 1990 >> Tempo Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.3L >> Test H - Fuel Control >> Code 86
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Code 86

Excessive lean fuel mixture condition corrected (made richer) by adaptive fuel strategy.

If an over-rich fuel condition is suspected or experienced, check ignition system. Burn off fuel deposits on HEGO by operating the vehicle at sustained high (legal) speeds followed by a few hard acceleration runs. This will allow the HEGO contamination to be burned off. Check the following areas: