tach is freaking out

Nope,didnt gap em,just jammed em in,lol...as for why irridium,I dunno guess Im a plug junkie,lol!

You guys will be happy to know that the problem is fixed! I simply tapped another ground into the existing one but much closer.Put a ring terminal on it and ground it with the stereo ground which is a known good ground. Problem went away.

Then I got dissatisfied with where it was mounted,so I moved it. Now I need to rewire it,lol!!!