1999 Ford Taurus Misfire 303 and lean code 174 with code 40

1999 FORD TAURUS
104,500 MILES • 6 CYL • FWD • AUTOMATIC
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DAVIDANDTHEKATRINACAR
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I have a duratech with the 303 misfire code along with the 401 and 174 code I have replaced the egr valve the egr back pressure sensor the pcv valve the 2 down stream o2 sensors the coil pack wires plugs fuel filter the iac valve cleaned the maf sensor replaced the plentum gasket along with some other things I can't think of right now still has a rough idle and a misfire along with the codes
May 25, 2009 at 9:01 PM
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YASGER
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try spark plugs first, then spark wires...


[quote:e928f7c381="Davidandthekatrinacar"]Engine Performance problem
1999 Ford Taurus 6 cyl Front Wheel Drive Automatic 104500 miles

I have a duratech with the 303 misfire code along with the 401 and 174 code I have replaced the egr valve the egr back pressure sensor the pcv valve the 2 down stream o2 sensors the coil pack wires plugs fuel filter the iac valve cleaned the maf sensor replaced the plentum gasket along with some other things I can't think of right now still has a rough idle and a misfire along with the codes[/quote:e928f7c381]
May 30, 2009 at 5:14 PM