Engine brake vibration

[trucklogger2]

I think I have a leaky injector I ordered the test tool
Thanks

I usually let prime pump cycle fully in the morning as it seems to not keep fuel pressure. Overnight the reading on fuel pressure is -1 psi then immediately up to around 250 psi on startup then -1 after shutoff
Never blows smoke on startup but sometimes blue smoke puff when coming off jake at low rpm and slow speed