Hey guys, Ive got a 94 5.0 cobra. I just did a tune up on it and put ford racing wires and some E-3 spark plugs in it. Ever since ive done this the car seems to stutter just a little bit in the lower rpm range, it never did this before and i even took them out and put them back in and made sure all the plugs were in right and the wires were snug. But idk if any of you have ever seen these new E-3 plugs but you cant gap them. Not that i know of anyways. Ive asked around and i was told that you dont need too. Just wondering if anyone has any idea why my car would be doing this b/c of a tune up. Thanks in advance for any suggestions.