This is just another attempt to “bandaid” fix a well documented problem. Which is the main Lift pump. As far as the pressure goes I ran 25-35lbs for 11 months the truck ran OK. I have one of those halfhearted “fixes” on my truck. I run dual charter pumps with 3/8 SS lines. I got 11 months on the first set of carters before they went south. I am working on the 2nd set. I took a look inside to find out just what went bad, to my surprises I found out. It was not the motor, or the rotor vain (the pump). It was the nylon bushing that connects the two shafts between them. The motor had more than enough power to rotate the shaft where I think the problem lies is in the viscosity of diesel at –10 deg F. it appeared to be to much for that bushing and the slot wore out at less than 12,000 miles and would no longer engage the shaft to rotate the pump. Both of my pump problems have been in the winter. If carter which makes the OEM lift pump put a steel bushing in the pump a lot of problems would have not happened. Or maybe they would have. This is only what I have seen on my truck. There is allot of other things that have happened to lift pumps. But how many have been looked at as close as this?