Saab 9000 (1984 - 1998)
OK, I had the following problem with the car today. It's 1992 2.3T TCS for those who don't already know.
Several times, when boosting quite high (and in 3rd and 4th gears) the car dumped all boost and the throttle went "firm", almost to the point where it was pushing against my foot! I thought...