Question about 1999 Ford Taurus

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More codes after fixing I thought I fixed the missfire

I had a miss fire on cylinder one. I have replaced the fuel injector, spark plug, and wires for my 02 ford Taurus and have changed out the EGR valve/sensor ( I got a code for this after I changed the injector). I thought I had the problem solved but now I am getting a P0172 Code Adaptive fuel to rich and the other misfire code has come back. What should I do to fix these? Is it possible that when I took the upper intake manifold off the second time I did not line up the gaskets and would this cause the problem? I have also visually inspected the vacuum lines and found no cracks in them but could this still be the cause?

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Have you looked into your MAF Sensor? Also, did you have the codes cleared after you did the work? If you don't clear the codes, they'll come back. You have to have the codes cleared with a diagnostic machine (I don't know if an OBD-II reader has this capability). If you didn't have them reset before, try doing it now and see if they come back.

Posted on Jun 28, 2009

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