MY 3

  • Tiny
  • Anonymous
  • 2000 Ford Windstar
  • 130,000 miles

My 3.8L windstar was running rough so friend OBD tested and came up with 4 codes. PO306, cylinder 6 misfire. All plugs were fouled but #6 very bad. PO171 and 174 system lean. PO453 evap emission pressure sensor switch high. Is PO453 the cause of running lean and fouled plugs.

Wednesday, March 13th, 2013 AT 3:03 AM

1 Reply

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

No, evap system is separate system.

I would start with compression test and replace the plugs.

171,174 may be low fuel pressure, vacuum leaks, pcv valve or mass air flow sensor.


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Wednesday, March 13th, 2013 AT 9:32 AM

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