truck seems to start really rough on idle and puff blue smoke, and oil is comming out of my breather baffel on top of my valve cover. whole under side of the truck is covered in oil now. seems like i have alot of crank case presure.. rear main is starting to piss oil now too. could this be a injector? bad vacume leak..? if you may think so whats the best way to find out? sea foam?