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

Tiny
DAVIDANDTHEKATRINACAR
  • MEMBER
  • 1999 FORD TAURUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 104,500 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
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Monday, May 25th, 2009 AT 9:01 PM

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Tiny
YASGER
  • MEMBER
Try spark plugs first, then spark wires.
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Saturday, May 30th, 2009 AT 5:14 PM

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