Goal is mpg.
Logical thought was air/fuel mixture, add more air?
So I threw more air into the system (bored throttlebody) she likes it, a lot, idles now at 1300ish? (No actual tachometer on truck) searched forum, found a few high idle topics. Grounds checked, c101 deleted already in past. Only difference for high (warm) idle is the throttlebody, ran normal before it. Still investigating and theorizing. I need to buy a REM too.