I replaced all of the plugs and now I'm getting a check engine light and it seems a bit sluggish. It runs rough at idle and slow speeds, and runs smooth, but outright gutless above 50mph. All of the cylinders are firing- I did the old, pull the wire off and see if the idle changes test. My only thought is that I gapped the plugs too big and it's getting some inconsistent misfires. I gapped according to the .060 specification; however, I noticed that the old plugs were gapped around .055. Should I re-gap to a different spec, if so, what should it be? I'd like to get some advice before I go back and redo everything . . . those back three plugs are a pain in the butt!
Thanks, everyone, for the quick response. I'll let you know how it pans out . . .
Thanks, everyone, for the quick response. I'll let you know how it pans out . . .