2005 DT466 Shuts off While Driving

You have "crud" in the fuel tank. It is getting stuck in the tank suction tube. When engine shuts off debris releases from tube until next time it is sucked in. I used to work on a fleet of these. Common problem. Save hassle and remove tank,flush and clean out. do not try to just drain it from plug on bottom.

 

Yep, fuel problem. Anything else causes warning lights.

 

Remove your fuel filter cap and filter at the engine. Drain out the fuel bowl by opening the water drain valve. Look at the bottom of the fuel bowl and see if there is any tiny springs or small pieces of metal. If you find any, this means the fuel pump outlet check valve has let go and you need a new fuel pump. Also at the bottom of the fuel bowl, you will see your fuel pressure regulator. It is like a small socket with an allen head drive on it. I think it is 1/4" or 5/16" allen head that fits it. You can unscrew this to remove it. I would replace it. You will see the pressure relief ball. It may be partially unseated by debris causing a drop in fuel pressure. Anyway, you will notice a compuchek fitting on the top of the filter housing cap. You plug in a fuel pressure gauge here to test your fuel pressure. Need 20 psi to start, 65 psi is normal running pressure.

 

Do you lose voltage? Bad ground?

I suspect a fuel issue though. Fuel lines could he bad, bad pump, etc

 

If the system cannot develop the proper oil pressure for the high pressure side, it will log a code. So if you have no codes or warning lights, it is most likely a fuel problem. Fuel problems are not monitored by the ECM and will not generate fault codes. So don't let them start throwing high pressure ICP parts at it.