Okay, this is for anyone else who comes across this in the future and, like me, thinks that they just screwed up...
So, late last night I headed to a more secluded area so that I could give my intake the Seafoam treatment. (I'm going to post another thread regarding that, because I think something needs clarified regarding spray vs. liquid! But anyway...) I drove the truck there, parked, and turned it off.
Started it up, did the Seafoam, and turned it off.
Started it up, and proceeded to drive it like I stole it.
WOT followed by coming to a complete stop and then flooring it like I was running the 1/4 mile. Did this a couple times and, low and behold, no more check engine light!!
It seems that the computer is readjusting and learning where the "zero" point is now that the pintle is a different length then before. I didn't know that was going to happen, but it seems to make sense now that I think about it. The computer has the MAF to measure how much air is coming in, the TPS to measure the relationship of the throttle and the pintle, and the O2 sensor to determine how well things are burning and adjust fuel/air accordingly. (I THINK
that's what's going on anyway...
The point is, it's working itself out. At the end of the night, when I'd come to a quick stop, the rpm's would drop down to just below 500 for a sec, then back up to about 750, then level off around 600ish. I have to drive a couple hundred miles today, and I'm willing to bet it'll be idling fine by the time I'm done. So, no worries.