My CEL didnt come on and Cody's zillion dollar scanner didnt pick it up either. Go to the junk yard and look around. I found 2 brand new Motorcraft coils for cheap. I had chased everything else, because it didnt show up on the scanner. Several knowledgable people confirmed the thoughts of it being a fuel issue. Nope checked good. Done a complete tune up including fuel filter...nope not that either. Long story short, I change a bunch of parts including IAC, EGR and O2 sensors. Runs damn good now though!