Hello everyone I NEED SOME HELP.

[Bengy88]

I think Rawze has other steps he follows but the first thing I do when the rail pressure falls like that is cap off 3 injectors at the time. First the front bank and then the rear and do the test again to isolate which injector or injectors are leaky if any. If I don’t find any leaking then I change the pressure relief valve. Also you need to pull the head off of your pump and check or replace your plungers depending on mileage on your engine.