I have a stall issue with my 90' model 6.2. When it is cold, usually after sitting all day at work or over night, the truck will start instantly, then stall. you then have to hold the pedal to the floor and turn it over for a while. guess till the lines or pump fill up with fuel. I think I have leaking injectors. Input on this issue would be greatly appreciated. This is my first 6.2, so I don't have much experience with it.