Kind of strange if I let my truck idle for like 5 minutes and then go to drive it, the turbo won’t work. I then shut the truck off and turn it back on and it works fine. Any ideas? Happens with tow haul mode on aswell. Thanks

I have a 1997 F-250 7.3 Powerstroke with around 223K miles, which was stolen from my stepdad a few years back, got it back all beat up in a ditch, got it running again. We've been using it normally for about a year now. 5 days ago I removed the exhaust so it has the downpipe coming down from the...