Fixing your DPF Problems in a nutshell...

[EOW]

Hi, I need some help! I have a 2008 Freightliner business class m2 with the Cummins ISC engine. I realize this isn't the engine that is mostly talked about on here but it is the same in a lot of ways. We've been having emissions problems. It seems to be always cleaning or trying to clean the DPF. It blows a tremendous amount of black smoke out the stack for a truck with EGR and DPF. It also is letting too much exhaust fumes into the cab. It also seems to have an extreme lack of power and burns way too much fuel. Our main check engine light is for crankcase overpressure. We've had it tested for blow by from the cylinders and that doesn't seem to be the problem and it doesn't seem to burn much oil. I gather from another forum Rawze posted on "thetruckersreport" forum that this may be our turbo. Our biggest problem is that this truck is a trash truck. It idles all day long and rarely gets above 40 MPH. If or when it does it's for a short amount of time. What is our solution??? I see two options. Option one: Try to keep the emissions system clean by doing the EGR tune-up and replacing the doser injector, performing a forced regen and seeing if that fixes our problems. I believe we need to have our turbo and CAC pressure tested no matter what we do.
Option 2: have the truck de-mandated.....
Now if this was an over the road truck where it could properly perform regens itself I would definitely try option 1. Being the application it is in I'm really not sure what I should do with it.
De-mandating it kind of looks like an easy road out provided the shop we found to do it does a good job. (Small local shop, others seem to have had good luck with them. $4000 to do a delete on this ISC engine.)
If we stick with the truck the way it is how often would we need to perform a forced regen? How do I perform a forced regen? Cummins insite software the only way? Where to get Cummins insite? How much does the software cost?
Thanks in advance!