2002 7.3 Won't Start
I have a 2002 7.3 auto that won't start unless the ignition has been on for at least an hour. When the ignition is cycled, the glow plug light comes on, the fuel pump runs for about 30 secs, and it will crank, but will not start. When the fuel pump is running, it sounds like you can hear an air leak coming from the engine bay. After having the ignition on for an hour, it starts really rough with white/ dark grey smoke out of the tail pipe for about 3 min. Driving it down the road, it does not smoke. Then.... when you get into 4th gear at 40 to 50 mph, the truck bogs down and shudders and shakes and you have to foot it to get it to downshift and accelerate. When you get above 50 mph, the shuddering and shaking goes away as long as you stay above 50mph.
We have replaced the fuel lines, the fuel pump, the high pressure oil lines, the fuel filter, looked at the glow plugs, and are stumped on what is going on. Have talked to multiple diesel techs, dealers, and no one has a clue what is going on. Please help!!!