A 2007 diesel engine with a DOC and DPF has an internal problem with cylinder 2 which causes insufficient compression for ignition. What might be a likely indication of this failure other than an engine performance complaint?
A) Black exhaust smoke out of the exhaust stack
B) The DOC outlet temperature is substantially higher than the DOC inlet temperature when DPF regeneration is not being performed.
C) The exhaust smells like ammonia.
D) The SCR catalyst is very hot.

Question

Quizplus · Accepted Answer

A higher DOC outlet temperature compared to the inlet when DPF regeneration is not occurring can indicate unburned fuel or incomplete combustion, often due to insufficient compression in a cylinder.

A 2007 Diesel Engine with a DOC and DPF Has