ISX won’t Regen properly

[matthewharrison2011]

(10-30-2020 )tree98 Wrote:  Did someone clean out the dpf with water or some other liquid? That's a BIG no no and can lead to the problem you're having.
Maybe the dpf is just worn out and needs replaced, do you take your dpf's to the dealer to have them baked and flow tested, or are you doing something else to clean them?
Could be you're doser isn't spraying properly and needs replaced. Have you done an EGR tuneup on it recently/ever ?
It would help to know the miles/hours on this engine.

No, the filter was sent out, baked & cleaned a few months back. The SCR was also replaced on a recall.

As stated in the post, temps don’t even come up high enough for doser to start spray. Atomized fuel will burn at certain temp+, but the exhaust never reaches that. If you mean the DEF doser, that wouldn’t really affect what’s going on here. I don’t think there’s been any EGR tune up done, but I can’t be sure. This is a shop with 10+ mechanics & lots of different equipment, everyone has their hands into things at some point.