I experienced this Monday and today for the first time. It was really hot out on Monday and assumed heatsoak retarded the timing (loss of power). I got the scanner out and on Tuesday I didn't have an issue, at one point the IAT2 temp hit 145F, but I was able to get full boost with a ton of retard of course. Today the no boost thing happened again coming home, really hot out on the way home from work (but only like 110F on the IAT2, A/C off). It would only peak at about 5 psi boost. My scanner was jacked up and commanded boost wasn't working, but didn't see anything crazy in the other sensors I am watching. I'll keep playing with it.