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Failure mode - Cummins 6.7L ISB Diesel (Ram HD, 2019+ generation)

Common-rail injector wear (2019+ 6.7)

Reliability tier: verified - verify before ordering, see /disclosure/

Symptoms

Compare with the other causes of the same sign on this engine: white smoke from the exhaust (3 causes) · ticking, knocking, rattle or whine (3 causes) · misfire, rough idle, hesitation or surging

Root cause

The 2019+ 6.7 keeps Bosch common-rail injectors fed by a CP3; wear shows as balance-rate drift and nozzle carbon, accelerated by tunes and filtration gaps.

Diagnosis

Fixes

replace worn injector(s); new copper washers/connector-tube seals every time ()

Prevalence

common

Affected configurations (40)