07 F-250...runs like poop!

[JayJay99]

07 F-250 6.0, 64,000 miles. Truck has S&B Cold air and a turbo back 5". No SCT or any kind of monitoring device.

So this morning I ran to the store, and I forgot to leave it running while I just ran in real quick. Started it back up and drove home. Let it idle for about a minute and shut it down. Now, it was operating fine at this time. Went back out about 30 mins later to head to work and when I backed out of the driveway and went to take off, truck had absolutely NO power and was puffing some white/blue smoke. Pulled back into the driveway (barely made it) and shut down. Check engine light is on. No way to check for codes yet, but it's on it's way to the dealer now. Any idears?

[JayJay99]

All fixed! Turns out it was just the egr valve.