Re: Rough(er) idle?
That can happen. If it has a miss for quite awhile it will set a code. sometimes there are spark plug boots that let the spark jump to ground causing a miss and no codes will be set for awhile. If you can feel it when it's idling, disonnect one fuel injector connection at a time until you find the one that doesn't change the condition and that's where to look further. Plug, coil pack etc.