Thanks, Mark. My car has JimF's resistor mod, or so I'm told, at the lowest of the 3 temps listed on his website. I have not looked at the resistor to verify this. My engine temps are in the 85-95C range most of the time, so engine temp doesn't appear to be an issue (I have heard of others with M119's in the 105-115C range in summer. )

My car had the TBA replaced by the PO to cure a stalling issue, and it was throwing codes as well. So that's new, and definitely clean & shiny - the old part (which I have in a box) was FILTHY on the bottom/hidden side of the butterfly! I'm kind of curious what a RENNtech chip would do, I have one that's awaiting installation, but I kind of wanted to "fix" the car first before putting the chip in.

I may have to find a chassis dyno to get some hard data to compare with other people's M119.974 dyno runs. I hope to do some stopwatch and AP-22 performance computer testing tomorrow or Saturday, which I'll post here...