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Code says "running Lean"

(1999 Ford Contour)
in Willow Street, PA on October 12, 2009
Changed plugs, wires, air filter, O2 sensor and oil. Cleared code but after a short run down the highway the check engine light came back on. I've checked vaccuum lines. Ran injector cleaner. No change. What next?
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Popular Answer
on October 12, 2009
If all of your vacuum lines are good and connected properly you are left down to two things. Either you have a bad gasket somewhere in the induction system (throttle plate, intake manifold gaskets, cracked manifold etc.) Or you have a weak, or failed fuel injector. Please post your code, and we can take it further
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