Also a lot of cracked insulators.

 

To those of you that found wild gaps or discussing looking plugs, have you noticed any extras mpgs?

 

No. Only runs smoother and idles better.

 

Same here. No mpg difference that I noticed. I drive different routes every day though, so it makes even harder to gauge a difference. Just seems to be a little more responsive, smoother idle and settled the shudder/misfire some.

 

Major MPG improvements on my side. In the 2 years i have had the truck i was not even close to being able to get the MPG's i get now. My gapping was out to lunch they were all at 0.044 and up. I get very good MPG now and i am not even trying. Anyways, now i am thinking i do not want to get the new CAC TSB because i am reading horror stories on it and i finally got the truck running perfectly, i love it now. I wonder if they could just change the CAC and not do the reprogram of the ECU. I will ask the dealer if it is possible.

 

What horror stories? I know some had reported slightly less power feeling but it came back for many. Many of us seemed to have better response and power after the TSB.
I really think it's all in how you drive. The computer adjusts to your habits. I can drive aggressively and have great response but if I drive moderately for a while it seems sluggish.
Maybe it's just me?

 

It was a dark and stormy night...

 

I just turned over 15,000 and got a chance to checked my plugs today. I was surprised that every single one of them were gapped at 0.32. Took some relief off because of reading all the threads on spark plug issues.

 

Just buy the Full-Race IC. You know you want to!

 

And my truck started shuddering so I pulled into the driveway of an old creepy house.