DPF question

Did they reset the parameter in the ECM to tell it that it has a clean DPF? Otherwise it thinks it still has the same DPF in the same condition. Besides backpressure it also runs a timer to tell when the DPF is full, even if it's okay, when the timer runs out it just figures it's time.

 

Don't know how close your engine is to my DD15........but I can say that on my engine, the DPF filter and Doser valve are two completely different problems. What I'm getting at, is that you may have a nice clean filter with a clogged doser valve......

 

I'd start here..............
http://www.thetruckersreport.com/truckingindustryforum/search/18242389/?q=cummins+doser&o=relevance

 

There is no parameter that can be reset to magically make a regen start working. Those resets are only for information for record keeping. It doesn't change the regen strategy at all. Basically if you had everything cleaned, DPF, DOC and injector, and you still get white smoke, this means your DOC is worn out. They do not last forever. We have good success with Road Warrior aftermarket brand.

 

It is coupled with the DPF, right before it. The DOC is your diesel oxidation catalyst. When the doser injector injects fuel into the exhaust it comes into contact with the DOC and the DOC converts that fuel into extra hot exhaust gases. The DOC is just like the catalytic converter on a car. It is like a filter with a precious metal coating that causes this reaction with the fuel to create those hot temps. Once this precious metal coating starts to deteriorate or get scaled over, the heat conversion becomes less and less efficient and therefore the exhaust temps are also not as efficient and the collected soot inside the DPF doesn't get baked down in to ash completely.

 

Yes, you should look at it. Everything has to work properly for a regen to work properly.