Blog posts tagged with 'fuel'

We all know the 2011-2016 LML Duramax features the CP4 injection pump which was supposed to be an "upgrade" over the CP3 units on the 01-10 Duramax trucks. This is certainly the opposite as it doesn't flow as well as the CP3 and the design can cause a catastrophic fuel system failure. When it does fail, it will send metal particulates throughout the entire fuel system and destroy injectors, rails, lines, etc.

For such a cheap price and easy install, this little product is worth every penny in my experience. It increases your fuel back where it should be from the factory and holds up better with tuned engines. Most of the time you will see a 10psi increase with this blue spring kit. This keeps air out of the injectors and prolongs the life of them as well. A big benefit of the spring kit is to keep fuel pressure above 45psi at WOT. *Note that the max spec for fuel pressure is around 70-72psi. The spring will hold a more consistent pressure and will not drop off over time like the factory spring. There's really no downside to this kit and I believe its a must on any Ford 6.0L. No this upgrade does not hurt the pump.