| Full de-mandate on a 15 litre Cummins |
| 04-28-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #1 | |||
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| Full de-mandate on a 15 litre Cummins I’ve got a 2017 cm2350 15 liter Cummins I’m wanting to de-mandate in a peterbuilt wrecker. It went to Rush truck for a recall and they did some tuning on it and it has been a turd ever since. Used to be a stout truck and it only has 30k miles on it. It’s on its second DPF in the last 2 years. Cummins trouble tree literally says to replace particulate matter sensor and if that don’t fix it replace the DPF, this makes 2 DPF and 2 particulate sensors and I’m not keen on putting another DPF on the truck if they are gonna cost me almost 7k a pop. I’ve went in and adjusted the regen parameters (I have insite with fleet counts and such) to enable temp stabilization and to drop the regen speed to 1mph looking for a solution and only thing that comes to mind is de-mandating the truck I don’t want any power gains I wanna stock truck de-mandated. It has set a 2692 (Cummins fault code for DPF system data erratic. Ran the deposit clean and everything passes air handling test whole 9 yards in at a loss. I had a friend come across this issue years ago in a trash truck and Cummins made him fleet calibrate it to a fire truck ECM code. He says it never came back for years. I have the capability to do so just not crazy about putting a bandaid on a bullet hole so to speak. IMO anything that eats its own crap ain’t worth havin | |||
| 04-29-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #2 | |||
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RE: Full de-mandate on a 15 litre Cummins (04-28-2025 )Fleetman13 Wrote: I’ve got a 2017 cm2350 15 liter Cummins I’m wanting to de-mandate in a peterbuilt wrecker. It went to Rush truck for a recall and they did some tuning on it and it has been a turd ever since. Used to be a stout truck and it only has 30k miles on it. It’s on its second DPF in the last 2 years. Cummins trouble tree literally says to replace particulate matter sensor and if that don’t fix it replace the DPF, this makes 2 DPF and 2 particulate sensors and I’m not keen on putting another DPF on the truck if they are gonna cost me almost 7k a pop. I’ve went in and adjusted the regen parameters (I have insite with fleet counts and such) to enable temp stabilization and to drop the regen speed to 1mph looking for a solution and only thing that comes to mind is de-mandating the truck I don’t want any power gains I wanna stock truck de-mandated. It has set a 2692 (Cummins fault code for DPF system data erratic. Ran the deposit clean and everything passes air handling test whole 9 yards in at a loss. I had a friend come across this issue years ago in a trash truck and Cummins made him fleet calibrate it to a fire truck ECM code. He says it never came back for years. I have the capability to do so just not crazy about putting a bandaid on a bullet hole so to speak. IMO anything that eats its own crap ain’t worth havin It depend on if you want to actually fix your emissions issues or not. It sounds to me like you are barking up the wrong tree with it.. expecting an OEM stealers$it to try to solve DPF issues is like taking your truck to the local hair dresser in town... they are equally about as knowledgeable about the subject. When is the last time someone did an actual EGR tune-up on it?... that stealers$it is not about to do any of that .. it makes them no moneys and they cant sell you the most expensive parts like DPF, etc. either. EGR tune-up work has to be done every year -- YOURSELF!!!... otherwise, it is not getting done. - and then every 2 years, the cans removed - YOURSELF, and taken to (unfortunately the stealers$it) to be de-ashed, baked, and flow tested for a few hundred bucks. LEARN TO WORK ON IT AND KEEP AFTER ITS PREVENTATIVE MAINTENANCE YOURSELF AND MOST OF THOSE ISSUES WILL GO AWAY!. IT IS THE ENGINE and its EGR system getting clogged up that causes damn near ALL of the aftertreatment issues. Those cans under there collect the soot.. not make it. Cleaning the engine EGR system and piping all out regurlarly + replacing all related sensors that are getting sooty once a year stops this. ================== On the other hand, if you live in a country where that stuffs is legal ...ehemm /... .. if you want to de-mandate it 100% yourself, then simply copy the program from the ECM (not very difficult to do) and e-mail it to me for a review and to have anything done as desired to it. That or get with one of the officially recommended people at the bottom of this post ... ref: https://rawze.com/forums/showthread.php?...2#pid81862 so that your not on here crying in a year form now with engine issues and a bad delete... and me telling you to copy the program to see what some idiot did in there that destroyed the engine or turbo. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
| 04-29-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #3 | |||
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| RE: Full de-mandate on a 15 litre Cummins I’m not expecting them to fix it! Ive been a diesel mechanic and have been aware of how aftertreament systems work. The only thing that has been touched by the dealer ship on this truck is recall work which the sticker slapped on the valve cover from the campaign done on this truck a few years back not only consisted of some after treatment parts being replaced but a calibrate done on the ECM as well. Ever since then the truck has been a turd. It used to accelerate up hills towing a school bus behind it now your lucky if it hits 35 at the top of hill. The problem I’m running into is the trouble tree just tells you to fire the parts cannon at the freaking thing and that’s it. I’ve done all I know to do as far as checking the egr/aftertrearment system as much as I can. Although this is our only x15 in the fleet so I’m not extremely familiar with them but I hear everyone on here talk about how finicky they are. I manage fleet shop with 500 assets and they are mainly 6.7 Cummins I know how they work extremely well. As far as the truck being worked on I’ve turned every bolt on it other than warranty or recalls.id like to know more info on the egr tune up you speak about? I also keep the cans blowed and cooked on all of our fleet every two years or if a turbo shits the bed/egr cooler what have you. That I see fit to cook and blow the cans we own the equipment to do that in house in our shop. I’m just at a loss on this x15 cause Cummins won’t give you any info but to pay them to fix it and eff that or fire the parts cannon at this specific fault code. It passed the air handling test passed the deposit burn passed regen analyzer and passed the scr test/nox sensor rationally test I’m open to ideas for sure. I know on our 6.7s if you change a few parameters in the ECM for after treatment the issue cut in half. We see more DEF headers not working correctly than anything now and an occasional turbo fault code for mechanical nozzle not responding which we tear down and clean the turbo cook and blow the DPF and send it out the door not to be seen again for awhile | |||
| 04-29-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #4 | |||
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| RE: Full de-mandate on a 15 litre Cummins You say you have the equipment to clean DPF's? Hmmmm........ this is a big red flag. What exactly are you using to clean and flow test them? | |||
| 04-29-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #5 | |||
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| RE: Full de-mandate on a 15 litre Cummins We’ve got the kiln to cook them. We normally do a pre treatment heat cycle which is an 18hr slow cook then we do the regen heat cycle to catch any soot that hasn’t been converted to ash yet. Then once removed from the cooker we put them in the blower which loads a tank full of air to blow 10 shots of 90 psi through the dpf and as it send the burst of air through the DPF or DOC it has a sensor on top of the cone that clamps down on the filter that checks the back pressure of the filter to make sure it’s manufactur specs the only reason we own one is for maintenance purposes cause the closes shop that blows them out charges 750 a pop and when you have 500 units in a fleet on an maintenance schedule you recoup your cost to buy both the machines to service the filters I think we paid just under 40k for both machines | |||
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| 04-30-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #6 | |||
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RE: Full de-mandate on a 15 litre Cummins (04-29-2025 )Fleetman13 Wrote: ... If your not doing EGR tune-up work, its like trying to use a buckjet to get the water oput of the bottom of your sinking boat... all while the drain plug is letting all the water in to begin with. I.E.> Fix the source of the problem (EGR tune-up work)..and not just simply the aftermath of it (the now clogged up emissions cans). info: https://rawze.com/forums/showthread.php?...pid=9#pid9 ================================================== (04-29-2025 )Fleetman13 Wrote: .... Not sure what your implying... are you getting the 6.7's de-mandated?.. are they being made more lenient with aft. systems still in place, still can regen, etc. thru a few custom setting changes ?. ? .. or something else?. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
| 04-30-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #7 | |||
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RE: Full de-mandate on a 15 litre Cummins (04-30-2025 )Rawze Wrote:(04-29-2025 )Fleetman13 Wrote: ... No these are not de-mandated. Completely stock what happens when you enable the temp stabilization parameter in the ECM it allows the DPF system to regen at a much lower speed versus your typical 45mph. It locks the DPF in a “keep warm” cycle (best way to describe it) till soot burn out is complete. So basically if you drop below 5mph it will kick the regen out and if you run a delivery truck or school school bus that does a lot of starting and stopping you can set your regen speed to 1mph and as long as the wheels are rolling you will continue to regen | |||
| 04-30-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #8 | |||
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RE: Full de-mandate on a 15 litre Cummins (04-30-2025 )Fleetman13 Wrote: ... Red engines can also be custom programmed to make everything a LOT more forgiving without doing a de-mandate. They also can be set to use a lot less DEF, etc... + disable all the derates and shutdowns so that it does not put you on the side of the road... similar to a fire truck. <- I thought that is what you meant, but your referring to something else. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
| 04-30-2025, (Subject: Full de-mandate on a 15 litre Cummins ) Post: #9 | |||
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RE: Full de-mandate on a 15 litre Cummins (04-30-2025 )Rawze Wrote:Correct! I was gonna put a fire truck ECM code in the truck (I’ve got fleet counts)but couldn’t find one that the CPL matched on. Idk if there is a fire truck ECM code that will have the same CPL or not but I was taught in Cummins school that number need to match Casie it’s based of engine internals. Also you probably don’t use but a quick tip for not burning up fleet counts on insite once you re-cal the ECM and it gets to the end and you ECM calibrate successful box pops up do NOT hit finished on the calibration workspace. Hit crtl alt delete on your computer and enter your task manager and force close insite and you won’t lose any fleet count tokens. There around $110 a pop I’ve probably brought back several bricked ECMs with fleet counts and have been using the same fleet counts for almost 7 years lol(04-30-2025 )Fleetman13 Wrote: ... On another note I may request help on loosing the parameters on this ECM like a fire truck so it doesn’t derate. It’s the only wrecker we have. Although not used often our shop ain’t trying to pay a bill for a wrecker to come get another wrecker | |||
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