ecm completed regens

[jman1978]

(01-19-2021 )JimT Wrote:  Sorry for the lag in response...

Based on your reply and my own first hand knowledge I'd say you need a new DOC and probably a new DPF. I had nearly the same issue. While a soot reduction by disabling the EGR might point to a faulty EGR valve, it's unlikely to be the main problem with incomplete regens.

The blue/white smoke and heavy fuel smell points to a lack of proper oxidation at the DOC. If it's occasional it might be related to exhaust leaks (especially common from a damaged exhaust bellows just after the turbo), EGR valve malfunction and DPF injector clogging/dripping (carbon buildup around the injector, bad or leaking injector, failed "dpf purge air actuator" which doesn't properly clear fuel from the lines allowing excess to potentially drain out through the injector into the exhaust). But if the problem persists then the DOC itself is just plain worn out.

Unfortunately when the fuel passing through the DOC doesn't oxidize and burn properly then it coats the DPF in addition to any ash or soot. This leads to greater exhaust restriction and the need for more frequent and increasingly less effective regens. Active regens typically fail, spew lots of blue/white smoke, cause temp alarms at the SCR can. Parked regens will usually work, but sometimes last much longer. Eventually the increased use of parked regens will wear out the DOC to the point that even those will fail.

I had these exact symptoms develop over the course of a year and a half and found myself at the point of impending doom almost exactly 11 months ago...

thanks for the reply
how did you fix it

[Chamberpains]

Hahaha, you may not like the route he had to take to fix it.

http://rawze.com/forums/showthread.php?tid=6446

[JimT]

(01-23-2021 )jman1978 Wrote:  thanks for the reply
how did you fix it

After spending lots of time and money it became apparent that my DOC/DPF needed to be replaced and my engine's oil consumption was too high. As I couldn't afford an inframe at that time I decided that a replacement DOC/DPF wasn't the way to go and opted for a drill, crowbar and hammer...

[jman1978]

(01-23-2021 )JimT Wrote:  

(01-23-2021 )jman1978 Wrote:  thanks for the reply
how did you fix it

After spending lots of time and money it became apparent that my DOC/DPF needed to be replaced and my engine's oil consumption was too high. As I couldn't afford an inframe at that time I decided that a replacement DOC/DPF wasn't the way to go and opted for a drill, crowbar and hammer...

sent you pm

[jman1978]

(01-14-2021 )Rawze Wrote:  

(01-14-2021 )jman1978 Wrote:  would you know how insite calculates soot load?
...

By estimating how much the engine might be making + what it measures with the DPF Delta-p and other sensors.

do you have any info on baro pressure sensors
it reads just below 26 inhg
and ambient is just under 30 inhg

[Rawze]

(01-24-2021 )jman1978 Wrote:  

(01-14-2021 )Rawze Wrote:  

(01-14-2021 )jman1978 Wrote:  would you know how insite calculates soot load?
...

By estimating how much the engine might be making + what it measures with the DPF Delta-p and other sensors.

do you have any info on baro pressure sensors
it reads just below 26 inhg
and ambient is just under 30 inhg

If they are more than 200k miles old, might just want to simply replace em and see if the values change. If so, you did well... if not, then keep the old one's as spare.