spn 157 fmi 18

[tree98]

Like i said you need to do a leakdown test using insite. If it loses more than 4000 psi in 1 minute (with 559 you most certainly will be) you need to figure out why. retorqe the injector quill tubes, cap injectors and re run leakdown test till you can isolate 1 or more injectors as bad. Where they genuine cummins injectors or aftermarkets? Have you replaced the relief valve at the end of the rail?