Question about 2000 Ford Windstar

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My Ford 2000 Windstar van is missing

My Ford windstar 2000 van is missing, giving error codes P1131, P0171, P0174. Especially when going uphill, it slows down, misses and I have to park it on the shoulder and then start it again, very painful. I changed the oxygen sensor in the engine but haven't changed the one by the catylytic converter. I have also changed the idle positioning sensor. Please advise.

Thank you,

Shah

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It is almost always the upper intake gasket that throws these codes. I would recommend replacing the gasket and intake bolts. Parts cost around 100.00 and labor 125.00.

Posted on Mar 18, 2014

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Since you are getting the 171 and 174 at the same time you need to replace the mass air flow sensor.then clear the codes.After which take the car for a drive and let me know how it does.

Posted on Mar 08, 2009

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