I think what caused the screen to plug was, I had on a couple of occasions used an additive called X1R, supposed to reduce friction, it bonds to metal, so I really think this is what happened. By the way, the engine was super clean on the inside, no sludge whatsoever. Screen plugging up, slowing the flow of oil, noisy pump, and then not enough pressure for the injectors. It looked like the varnish that plugs up a gas filter screen, a light tan in color. Well, I pulled the screen, low and behold it was 95% plugged. While waiting on my Oil pump to ship, I learned about the oil screen below the oil cooler, the screen filters the oil that coes to the HPOP. I got on Ebay, got a set of intake gaskets for $20, and a HPOP for $200, and went to work. So i figgured, since I was going to have most of the top part of the engine apart anyhow, why not go ahead and change the HPOP. Then thanks to "BISMIC", I was able to really start studying about what made these 6.0s tick.
6.0L HOVERS AT 3000 RPM CODE
I made a post here "Low Fuel Pressure", and got a few responces, found out that code was about The HPOP pressure. I hooked my scan tool up, I got a code P2002(I think), Low Inj Pressure. The boost was good, I went home and changed the fuel filters& ICP sensor, same thing. But the next time I drove it, it seemed a little sluggush, and when I stuck my foot in it, it was like throwing out an anchor. Well befor I did start to change the injectors, I started to town one day, and as I sometimes do, decided to blow the soot out of that big 4" pipe, everything was well. I decided to go ahead and replace all 8, and do a turbo cleaning at the same time. In the mean time I started thinking about those 2 c94's that were still in there, and started watching and buying injectors off Ebay. At around 128K I started hearing a noise when under heavy power demand, sounded like a power steering pump going bad. Other than that just a couple of small problems. At 85k, the dealership replaced 6 of the c94 injectors.
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