cm2250 derate

[Rawze]

(08-10-2022 )solo_shooter_ Wrote:  Okay, I replaced the tappets and plungers, re-tightened all fuel connector nuts and performed the leak down test. I started the test out at 28,906 psi, at the 30 second mark I was down to 9,050 psi and at 60 seconds I was down to 4,983 psi. So I am aware that there is a severe leak somewhere inside this fuel system but not sure where to go next. Possibly a bad injector? Or a cracked head?

the first priority is to get it to pass a rail leak test, as specified in this video...
ref: http://rawze.com/forums/showthread.php?t...2#pid69262

after you can get to pass a rail leak test with less than 4,000 psi leak rate in one minute.. then you can start with the other issues.

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if it still fails ... next would be to replace the high pressure relief valve on the front end of the rail and then do the tests again.

After that, if it still fails a leak down test, you will need an injector block-off kit so that you can cap off up to 3 injectors at a time to find the bad injector(s).