2000 FORD WINDSTAR
130,000 MILES
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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.
Mar 13, 2013 at 3:03 AM
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ASEMASTER6371
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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.

Roy
Mar 13, 2013 at 9:32 AM