spark plugs ?

[68_GT]

I pulled one and planned to re gap them and noticed they have the markings CYFS12YT3 on it. The gap was right on .30 I closed it to .28. Wondering if I should bother with gapping the rest while Im at it or replace these plugs and gap the new ones to .28 or even .25 ? I plan to run the Xv1 when ready. I get a slight miss here and there and hoping this will help it. Also what is the torque spec on tightening the plugs ?

I think these are not the updated plugs right ? if not what should I replace them with ?

thanks

[JMR76]

I gapped mine at .030.  Torqued at 132 in/lbs or 11 ft/lbs. 

If yours are stock plugs, I would check all of them.  I found some gaps to be as high as .038.

[68_GT]

yeah the  stockers  were at 30, 32 and 35. My torque wrench went to 132inlbs so I used that. I gapped them at .28. Drove the car and no misses at WOT from a dead stop from 0-90. From a roll still get a slight stutter at the downshift between 4500 -5000 rpms. Not every time (it's the same as before). Thinking its the tune / fuel pressure drop like others are reporting.

What is the point of going to a different / colder plug ? Are mine the newer truck version plugs ? Wonder if / when I'd need different plugs ?

I have the 3bar map and thermostat waiting on the XV1. I hope that tune not only gives more power to redline but also resolves that stutter.

Can I data log with my iphone5 ?