Question about 1992 Ford Explorer

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Truck surges in gear idle. Check engine light comes on at about 5 miles out. Truck runs fine other than this problem

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Check to see if there is any vacuum hoses off at the black intake tube, or at the vacuum tee on the left rear of the upper intake manifold. The vacuum
hose(s) on the tee were a common problem, and would come off, creating a lean condition and set the check engine light on.

Posted on Oct 07, 2009

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Hope this helps and thank you for using Fixya.
Here is a link that my help you in the future. http://www.troublecodes.net/GM/

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