Question about 2003 Ford Windstar
Posted by Anonymous on
You have one on each manifold pre catalitc converter then you have one after catalitic converter sometime the use as many as four one before the catalitic converter and one after this controls fuel trim and tells the computer if the catalitc conveter is working or not. If it has two one before and one after the catalitic converter this is usedd to control overall long fuel trim. the two on each manifold will be heated so the engine will reach closed loop quickly once in close loop this allows for the rest of the engine componets to work, and that includes knock sensor timing advance and ****** and fuel rail pressure more or less depending on readingsform 02 sensors also controls when the egr VALVE comes on, if it comes on too quickly it will cause the engine to get poor fuel mileage and casue spitting out of black smoke from being to rich. Also could plug the catalitic converter and could damage the engine. Thanks for using fix-ya and hope this helps.
Posted on May 19, 2010
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Posted on Jan 02, 2017
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