Exhaust gas pressure during regen.

[Rawze]

Also the 553 code is not normal at all. Maybe a clogged screen in a return line .. or too much return flow due to leaky injectors?

Will it pass an injector leak-down test?. If so, what is the leak rate in one minute at 29,000 psi?
ref: https://rawze.com/forums/showthread.php?...3#pid75483