Okay, not be a ls1.com newbie or anything, lol, because I am not, I gapped my plugs at .059 around 5,000 miles ago. I now have 12,000 miles on the car. The idle seems to be a tad, barely noticable rougher. What should I do? Pull one plug and see how it looks? Also, what shoulD i gap them at, that seems to high. Lastly, how to use that little gapping tool guage? Do I just slide it in corresponsing with the right number and push on the copper elctrode? Thanks!

 

It all depends on what plugs you are using. What did plugs did you install?

 

TR 55