If the tubes were leaking would it leak fuel in the oil?
Yes.cap the rail by taking the line off and putting a cap on it? I have never heard of this but ill do whatever it takes to get this unit back up on her feet. what if i did an injector kill test on one injector at a time and drove the truck to see if it quits popping on one of them. would that be the same a capping the rail? also can i visual inspect the tubs and see problems?