So I bought my blazer last June and did the basic things when you buy a used truck.......I sea foamed the truck on old plugs and after put the supposedly great e3 plugs in.....so I put 16 thousand miles on my truck this year and noticed it misfiring.....so I figured I put a third of a can of sea foam in the gas tank and a third in the intake.....couple days ago my truck started to chug and stuter when I hit the gas....so I pulled a plug angle nothing but junk on them so I changed the rest with ac delco plugs and now she runs like a champ again.....not going to waste my time with e3 plugs...there all bark and no bite as they say....

 

I've read they go pretty quick and aren't worth the extra buck. Also heard that our trucks run best on the stock AC Delco's.

 

i ran e3 in a mower for about a year. after the year they didn't even fire. i had no spark. there like 5 bucks a piece and not worth a penny of that.

 

Yeah, I've known of a few people that ran them and ended up taking them out shortly after.