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Mileage sudden drop
1999 Mercury Mountaineer

Mileage sudden drop

(1999 Mercury Mountaineer)
check engine light on and code indicates lean burn. Sudden drop in mileage per gallon from 15 to 10. what could the problem be. The mechanics here are baffled.
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Popular Answer
on June 26, 2009
Can you post the codes that are being stored in the engine control module?
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Check Engine Light Diagnosis
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on June 26, 2009
Can you post the codes that are being stored in the engine control module?
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