I have a problem with my early 95 psd
that I could use some help with.
It has a intermittent problem where at highway speeds, it will start stumbling and lose power. It will come on all of a sudden and the truck will downshift, I will have the hammer down and rpms will go up to 2500 or 3000 but it will just keep slowing down until i pull over. Often times I can keep feathering the throttle for a few minutes, and then it will be fine for the rest of the drive. This might happen once a month or once a week. Sometimes when I'm pulling a trailer, most times not.
I have changed the IRP, ICP
, glow plug relay, fuel filter, fresh oil change 1000 miles ago, fuel pump, back flushed the fuel lines, it has a new air pump, new glow plugs last spring, new front crankshaft seal, and a new lpop
O ring. I checked the screen going into the side of the fuel bowl. Looked good. Truck has 330,000 miles. First fuel filter was pretty dark looking. I'm not sure when it was last changed. New filter has been looking good for the last 10,000 miles.
Any ideas? Thanks!