They were a pain to get to;
The coils were removed and looked to be in good shape
Pulled the #2 plug out, what do you know... small spark plug gasket leak!
Pulled out #4, #6, whoa pretty bad.. not bad for 108,000 miles (gap was off .06 which was phenomenal I think for the age, these NGK's rock! .44 gap stock .49-.50 on ALL of them after removal)
Here's what the whole left side looked like (the right side was much better looking)
We couldn't ignore the throttle body while doing the service, that thing was so full of deposits! I just used a clean shop rag dipped into brake cleaner to wipe clean. We also used a fiber optic camera to look into the manifold, it wasn't too bad, so I didn't do the induction cleaning. There seemed to be some sort of gray paint on the plate around the sides, we didn't mess with it.
After the throttle was cleaned and everything put back together, the idle was at 1,200 RPM (maybe because I moved the throttle plate) I did the Idle Re-Learn programming and all was well after the fact. CEL came on with P0507 since we missed a cracked hosed on the manifold and simply replaced it and reset the light.
so far so good, everything is running smoothly, no hesitation and pinging at high RPM's.
Thanks