Tuning idle on a 2006 Corvette Z06 LS7. The car used to have a cam and some other mods but was supposed to be taken all the way back to stock (except exhaust). I took idle and airflow tables all the way back to stock repository LS7 tables but it consistently has a high idle condition. I have tried several things including knocking the base idle airflow minimum WAY down and even knocked the timing down to 6 degrees to try to get the idle rpm down. I found the one idle tunining thread but this car just doesn't respond as discussed.
Demand rpm is 675, but it wants to idle around 1000 rpm (above VSS/adaptive speed it idles a little lower at around 800 rpm).
It actually seems like a vacuum issue but I sprayed it down and couldn't find anything wrong. I unplugged the throttle and cycled ignition on a few times to see if it changed/reset anything, but it did not. My next thought was to take intake apart and make sure someone didn't drill the throttle blade or something.
Any thoughts?
Attached should be the tune and log where I start out rolling slow then come to a stop and idle raises. (DELETED because found hole in throttle body)
Note: on the log the wideband is not actually hooked up