It's been a while since I've been on. The board was a big help a few years ago when I had blend door/ AC issues. Figured I could get come good input. Truck is a 2005 5.9L
So here's the deal - about six months ago, I went to crank my truck one afternoon leaving work and it took forever to start (like 15-20 seconds). First time it ever did not crank within 1 second. It had a real bad miss, to the point of the whole truck shaking. It got better as it warmed up so I went home and changed the fuel filter, dumped a gallon of PS in the tank and took it out and ran the dog sh*t out of it (not really just a little). Never happened again.....until yesterday morning. Temps here were in the 70's the day before and yesterday morning it got colder( like 35). Not cold enough to really affect anything in my opinion. So when I cranked it, it had a horrible miss and was blowing white smoke bad. But the smoke would clear up when i press the accelerator. Gets better once its warm but when it's cold, she sounds rough. Anybody have any input? I'm leaning toward injector issues but want some opinions

 

Sounds like you have one or more injectors leaking and bleeding off pressure.....hence the long starts and white smoke.

 

i would say injector issues also. check the rail pressure, If you have an injector that isnt fully closing it will not have enough pressure to keep the rest of them fed. or you could do an injector drop test to see if you can narrow it down to one.