Alright, I snagged this info from moparchat. TSB 11-023-00 involves
reprogramming Daks, Durangos, JGC with the 4.7 to fix the problems listed
below. I imagine that, along with a few tweaks, it retards timing at WOT. I
don't know if this is a new flash or the same one that others have received,
but I don't remember seeing the specifics before. Personally, I'm looking to
make as much power as possible while having no ping and stick with 87 gas, so
the new PCMs won't do me much good when (if) they're released for the 4.7.
Because you can't go back afterward I'd like to find someone that's done this.
Do the new flashes have a noticable drop in dyno runs, butt or otherwise? I'd
prefrer a little ping at WOT through 2nd and 3rd if the alternative is putting
my 4.7 on no-doze. Anyone have thoughts or numbers?
It will address the following symptoms:
1.) Part throttle or wide-open throttle spark knock
2.) Sag or hesitation following a cold engine start
3.) Rough idle
4.) Idle sag on deceleration to a stop
The TSB involves reprogramming your PCM with new software (99Cal20 and
00Cal17)
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