Question about 2000 Ford Explorer
The upper intake manifold gaskets and isolators (the bolts that hold the manifold down) leak and cause the p0171 and p0174. The reason they leak is due to a missing baffle in the front valve cover which allows some oil into the upper intake which swells the gaskets and wears them. The manifold gaskets and valve cover should be replaced. But before having this done check to see if the black plastic hose on the back of the rubber intake hose(between the throttle body and maf) has dislodged. This happens alot when a new air filter is installed and will cause the same codes.
Posted on Apr 08, 2010
I had a 1999 windstar, there is a few recalls on those, Our local Ford Dealer had to replace the upper intake manifold, This took care of the lean engine codes, check for a dealer free recall fix from your local Ford dealer,
Posted on Mar 31, 2010
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Posted on Jan 02, 2017
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