rough idle when truck is in gear
I have a 1998 4.6L F150 that recently has developed a rough idle when the truck is in gear. It runs fine when it is in park. I noticed today at a stop light the truck was even shaking a bit from the rough idle and when i went to take off my CEL flashed a few times then went away as I gained speed. I have heard everything such as bad coil packs, bad plugs, bad wires, and now after looking around on the site i am seeing info about a dirty IAC. Does anyone have any idea what this problem might be from? Any info would be greatly appreciated.