Attention: TDR Forum Junkies 
Probably a dumb question but should I ever smell diesel out the exhaust?
I took the truck (58k on speedo) into the dealership in late june for a bad turbo speed sensor and listed the diesel smell complaint on the work order and didn't get an answer from them on it. Got a new sensor, but no answer on the diesel smell.
Fast forward to July and mechanical problems on vacation due to DPF codes, loss of power and such. 200 miles from a dealer with the grandkids, dog, wife and trailer in tow so opted to clear the codes to allow the DPF to start regen, which worked.
Back home after vacation and on to dealer with codes written down, another diesel smell complaint and soot in the tail pipe. Dealer cleaned the egr valve, did a stationary desoot and completed the "Cummins Worksheet" and gave it back to me. Still nothing on the diesel smell, soot in tailpipe or if they followed the TSB on the codes or not.
I know I have a cracked DPF (soot in tailpipe), have lost 10% towing mileage and not getting the same towing power I have for the last 4 years (Boost lag at 1600 rpm and downshifts on easy grades-hills when towing 7-8k lbs). I posted a mega post about this on another forum with full details and didnt get any real answers. More on this later...
As I understand the bluetech system, diesel is injected in the exhaust stroke to be oxidized in the DOC so that proper temperature can be reached to desoot the DPF. Any remaining raw diesel is cooked in the DPF during the desoot event and nothing should be coming out the tail pipe.
Or am I wrong? The reason I'm asking is the exhaust smell started happening in May-June, before the DPF event and could show I had a pre-existing condition that caused the DPF event. Im taking it back into the dealer next week due to the soot and mileage issues and want to be loaded for bear (or at least more informed).
Also, under what warranties is the DPF covered? I have 1k left of the long term California emissions warranty and 11k-17 months on the Cummins warranty.
thx in advance, dan
I took the truck (58k on speedo) into the dealership in late june for a bad turbo speed sensor and listed the diesel smell complaint on the work order and didn't get an answer from them on it. Got a new sensor, but no answer on the diesel smell.
Fast forward to July and mechanical problems on vacation due to DPF codes, loss of power and such. 200 miles from a dealer with the grandkids, dog, wife and trailer in tow so opted to clear the codes to allow the DPF to start regen, which worked.
Back home after vacation and on to dealer with codes written down, another diesel smell complaint and soot in the tail pipe. Dealer cleaned the egr valve, did a stationary desoot and completed the "Cummins Worksheet" and gave it back to me. Still nothing on the diesel smell, soot in tailpipe or if they followed the TSB on the codes or not.
I know I have a cracked DPF (soot in tailpipe), have lost 10% towing mileage and not getting the same towing power I have for the last 4 years (Boost lag at 1600 rpm and downshifts on easy grades-hills when towing 7-8k lbs). I posted a mega post about this on another forum with full details and didnt get any real answers. More on this later...
As I understand the bluetech system, diesel is injected in the exhaust stroke to be oxidized in the DOC so that proper temperature can be reached to desoot the DPF. Any remaining raw diesel is cooked in the DPF during the desoot event and nothing should be coming out the tail pipe.
Or am I wrong? The reason I'm asking is the exhaust smell started happening in May-June, before the DPF event and could show I had a pre-existing condition that caused the DPF event. Im taking it back into the dealer next week due to the soot and mileage issues and want to be loaded for bear (or at least more informed).
Also, under what warranties is the DPF covered? I have 1k left of the long term California emissions warranty and 11k-17 months on the Cummins warranty.
thx in advance, dan
