ISM 320V 2010 No Boost

[Rawze]

(07-18-2023 )Lakepremix Wrote:  Good morning. In desperate need of help. Have a 2010 Kenworth ISM 320V Mixer truck. Had a bunch of dpf issues. Had the filter cleaned. Worked great for 2 months. Then started needing a regen daily. Found the dpf pressure differential switch was bad (thus thinking it always needed a regen). Changed out switch, all codes/faults are cleared with no new but now have no boost whatsoever. Bought insite to try to figure it out better. When accelerating, we get a air fuel control derate. Mechanic got a max of about 4 psi of boost. There wasn't any loud noises etc, just pulled out of yard and half way down the road lost all power (no power now, revs slowly in idle etc).

Am completely lost as to what to do. Can't hear any turbo spooling but turbo was inspected with no noticeable problems. VGT was removed and calibrated with no faults. Just absolutely lost and was looking for any suggestions on data to look for in insite that could direct us towards a potential fix without tearing into engine.

Please help so my sleepless nights improve!

It is the ENGINE that causes regen problems.. those cans just collect the aftermath, and the truck is completely incapable of cleaning itself properly by doing a forced or parked regen cycle.

First of all by the time you have regen issues, it is almost always due to the enigne's EGR system being severely neglected. A thorough EGR tune-up + having the cans baked, de-ashed, and flow tested ( a few hundred bucks to do if you take em off and to a stealers%it yourself) usually solves 90% of all regen issues. Also, after baking the can out, you need to perform a DPF replacement procedure in Insite. Otherwise the engine is not going reset its internal 'soot counters' that o0nly count up otherwise and throw faults.

Someone should also post a screen shot/pic of the regen history. What is the INHG values on the for right column in the regen history?>,. If it is averaging more than 3.0 or so, then the system is restricted and clogged up... there will be issues. Also look at how often it is regenning. If that truck is a local truck.. it is DOOMED!.. as it will not run on the highways long enough to do proper rolling/passive regnes every 4 or 5 hours of steady highway driving, and cuimmins has absolutely NO solutions to this very real and plaguing issue at all. They always blame the damn driver for their incapable system that is not compatible with local driving.

But in your case however (concrete trucks etc)...

Normally, I would tell someone to tough it out and fix what they have properly.. make the systems work and not neglect it .. but in a local trucking operation that does not run down the highways 5+ days a week for several hundreds of highway miles each day, this is not possible at all.

- Unfortunately, the proper solution is otherwise obvious for locally driven trucks (a de-mandate). This is because you will never keep those cans happy any ways unless you want to send the trucks on the highways for 400 - 500+ miles back and fourth about 2 times a week, wasting fuel and efforts just to let it regen properly on its own like the dumbarsse stealers$its would suggest.

. ehemm... but no one on here is going to officially tell you to do that, as it can be against some regulation on some countries. I PM'd you my number if you want more info regarding this, as there are wayy too many horror stories about people having that done and getting ripped off, or finding out they spent a $$ of moneys when they could have done it themselves.. or at least avoided the all too common bad programming plague out there too.
======

as far as the boost goes, that could be a number of things including severely neglected air cleaners, CAC problems, clogged up exhaust, or the ecm simply refusing to operate the turbo or other things properly due to derates, etc. Could also be a damaged turbo (turbine damaged, positioning problems once it is warmed up, etc.). What is the commanded and measured positions showing in Insite when it is acting up?.

And has anyone bothered to manually control the VG turbo (Calterm software is needed) and see if it chokes the engine down when commanded to 100% closed?. Likely not.

And what s the engine ser#?. so that I know what model engine it is exactly.