truck: 96 f350 powerstroke with e40d. no mods besides 6637 filter and straight piped.
on three different occurances over the last 2 weeks upon startup there has been no action from my turbo. 2 of them upon firing it up the turbo was not working at all then after a mile or so it started to spool. the other time it started up and was spooling then died out. this morning when i started it up there was no turbo action then after about a mile it made a sound like something opened up and it started to work again
what do I need to look for or fix im lost? its intermittent and very odd to me.