Check your DPFE sensor. Try unplugging it if it goes away replace with a new sensor. Should be an easy test. It is the silver box that has two hoses coming out of it and a connector attached to it on the driver's side rear head.
1999 3.0L Cougar: 220fwhp and 200tq
2003 VW Passat W8 with 4 Motion AWD
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PM for intrest in 3L SVT Contours, 3L swaps into your current car, Prepped 3L engines, or anything 3L related.