I'm at the point of a second plug change. The first set were replaced by the dealership because no one else wanted to touch them. Do I need to worry about any of the plugs breaking on this second set? I am still going to use carb cleaner like the TSB says. Any info would help.

 

How many miles on current plugs?

 

Did they use the nickle anti seize like the TSB states?

If so you should be good

 

They are at about 65k. But I've been having misfires with no codes.

 

I'm in the same boat. Misfires every now and then, mostly under load. My rig has 122k on it and the plugs have about 65-70k on them. I ordered new COPs and MC plugs. I figured since i'm going to be under the hood, might as well do everything. Also, I did the first set of plugs and used anti-seize on them. so "hopefully" there wont be any issues. If your dealer used AS you should be ok as well. GL

 

Have you replaced the COPs? And do you use any fuel cleaners, stabilizers or octane boost? Apparently if used too often it fouls the plugs. Apparently that's how my plugs went bad after only 6-7k miles. Or at least that's what I was told by my buddy who owns the shop I took it to. I think he's a good friend?? haha

 

Fuel additives fouling plugs? Never heard that one. Most quality gas suppliers such as Mobil, Shell, and BP add them into their blends. If it were fouling plugs, we'd all be complaining about it by now.

 

I wouldn't think there'd be enough to foul plugs... maybe if you filled the tank 25% of fuel stabilizer but I'd think you'd have larger issues at that point. Besides, the mixture should be controlled and at 14.7 mix it should be fairly lean enough to burn that off. I could be wrong?

 

willis5447 did you do the plug change yet?
I did mine on friday night. Broke one plug..my right angle drill and a 3/8 drill bit and i had her out in less than 5 mins. replaced all plugs and COPs.
hope yours went well..