I am driving home from lunch today and some jerk in a Duracrap is tailgating me while I am getting on the highway. I put the go pedal down and nothing. Boost goes to MAYBE 5 pounds and truck can't get out of his own way. So, back it off, slow down a little more and give it fuel, nothing. Now the boost gauge is at zero. Come up to a stop light and go to take off, nothing. Zero boost, feels like my 1985 Subaru. Pull into shopping center, shut off, go in to get a sandwhich. Come out in less than 5 minutes, take off and the boost shoots up to 20+ and the back end feels loose. Power is back. Truck sounded like it was knocking when there was no boost (but hard to hear at driving speed because it is so quiet) and no turbo noise. Was idling fine when I shut it down. No lights came on. Dealer says Regen shouldn't cause anything close to this. What the heck is going on?