First off the coil packs are the exact same from the 2.5 and the 3.0. Second, you may want to clean your MAF, cuz when it gets dirty it reads a lower frequency and tends to run richer, 12.6 is ideal on the dyno. Oil impregnated air filters are horrible for the mass air meter, K&N filters kept coating my sensor with oil over time so I switched to a different filter.
My advice, change the fuel filter and clean the MAF.
98 Contour SE 3.0L 5-speed
SCT PRP, Gutted IMRC's, Fidanza Flywheel, Race Ported 2004 3.0L Oval Port, Zex 125hp shot, 70mm Mustang TB, 42Lb injectors,Walbro 255 pump, Traction Bars, Zeitronix wideband o2, lots of little things, 10,000K HID's!! 
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