Cummins 400 ISL diesel particulate filter

5 years ago when I was looking at diesel pushers, it appeared that 2007 motor homes didn't have the dpf and 2008's did.

drwwicks, on second thought, your new coach probably has a 2006 chassis which may very well have the pre-particulate emission engine.

I think they called the ISL's with the particulate filter, 425 hp Cummins (I could be wrong). Ours was called a 425 ISL.

MM.

Presumably you're asking if your new-to-you coach has a DPF? As stated above, Cummins should be able to tell you, as could Itasca/Winnebago if you call there with the VIN.

We have a DPF on our 2014 and have had no problems with it (and hopefully it will stay that way). There was discussion of a poorly-manufactured DPFs cracking and I'm sure you can find that information by Goggling it. Mostly I've read about that happening on Tiffin Breezes, but I don't really pay attention on what other manufacturers might have been effected.

Idling isn't a huge issue unless you do it for a long time and the system isn't able to do a regen and burn the soot ouf of the DPF when it needs to. You need to take it up to highway speeds so it can do that.

Congrats on your new Itasca.

drwwicks, we had a 2008 Monaco Dynasty on a 2007 frame. We had the diesel particulate filter and never had a problem with it. It will go through a regeneration every 8K-10K miles. In the 69,700 miles, ours seemed to hit it about every 10K.

You have to use Ultra Low Sulfur Diesel (ULSD) at 15ppm, otherwise, you will clog the system. Low Sulfur Diesel (LSD) is 500 ppm.

Mexico does not sell ULSD (from what I understand) so fill up before you go over the border. We never took our coach to Mexico.

Many manufacturers bought 2006 engines and put them in later model motorhomes, yours may have a previous emission engine.

Our new coach has the particulate filter and the Diesel Exhaust Fluid (DEF) requirement. No problems in 14,000 miles.

Safe travels,
MM.

Give Cummins a call with the engine serial number:

Cummins 800 343-7357

Might also ask if it has an exhaust brake or engine compression brake. The ISL could be ordered with either, with the engine compression brake being much stronger and more $$.