Lets start with I have a 2004 Excursion with 145,000 on the clock. Its has been running fine... after egr cooler, oil cooler, water pump and IPR replaced (luckily under warranty). On friday i was headed home, and suddenly, at the stoplight, i lost all power. The engine is still running, but i have no power, could hardly get it to pull into the parking lot. The engine is running smooth, but there is no wistle from the turbo. I shut it down, and made some calls, Friend says its prob. the MAP sensor. After about 15 min, it started up, and ran fine back to the house. I changed the MAP sensor, and went for a drive... Same thing... lost power once it warmed up. When it does this, you can hear the turbo intermitantly.. just an occasional whistle. Someone plaese HELP!!