 I took a trip about an hour here a while back, and it did it to me twice within about 30 miles. And then I shut it off, turned it back on. The whole rest of the way down there and back, it never did it again. If it's got a problem with the ABS control unit and it's shutting the inlet valves off, it would do that. A pedal would be hard as a rock, and then if the ABS went off, then it could release it. So it sounds like I'd be looking that direction to see what's going on.