Need Help with losing power
Here is what I have done. Have 05 Durmax with 206k. I have changed the fuel filter housing, filter, (whole unit) and the two hoses that are connected to it. I also flushed the fuel cooler and the fuel likne go back to the tank and cooler with air.
Here is the problem: I am trying to leaving with the Fifth Wheel tomorrow at 6pm central.
When driving with no load over 68 or 50 with a heavy load I lose power and can only do 66 with no laod or 35 with the load. I would say it feels like it is not getting enough fuel.
I had a friend use a GM computer to pressure test the fuel system. When the pressure gets to 160 MPA it bogs then the test defaults. It will not get over 160.
Thanks for the help