I have a 2005 6.0 powerstroke that all of a sudden has no power. We cleaned the turbo vanes and put a egr bypass kit on and still no luck. This started not long after ford reflashed the computer.

There's a trade-off between mileage and towing power, when such changes are made.

I have a similar problem that started 2weeks ago. Truck ran fine for 10-12 miles then just died as I pulled out and put the accelator down. This has happened 3 times. I left the truck sit for a few hours, it started and I drove off. Problems seem to occure once truck is warmed up. I change fuel filters and it still happens.