Cummins SCR stuff

[Clubbs]

Pretty certain I'm approaching a clogged SCR. Truck seems to run fine, still has decent power. Mileage is averaging 17.5 not towing. But Its sucking down the def much quicker than it used to.

Running calibrated power emissions in tack tunes and have been for awhile.

Anyone been through this? What happens next? If parts fall off where does one get a different code for the ezlynk these days?

 

[CLRracer]

Allegedly, CA Tuning from the great white north is a damn good set of tunes. I may or may not know someone who has them, but some medical issues have sidelined their testing of them for a bit haha.

Duane

 

[rabb11d]

Optimal Welding, also out of Canada, prob has what you need. I used his EFI Live tow tune on mine. Had it for around 40k, no issues.

 

[Clubbs]

Ran through 100 gallons of diesel and 5 gallons of def in 720 miles. Maybe that's normal, but the CEL because the def tank heater isn't cooperating wasn't fun last night.

Got some researching to do on all this

 

[CLRracer]

Man, my last gallon of DEF went like 60k miles.......

Aren't you already tuned? A call to your tuner asking if they have any "off road" tunes would be one of my first calls.

Duane

 

[jeepinmatt]

Ran through 100 gallons of diesel and 5 gallons of def in 720 miles. Maybe that's normal, but the CEL because the def tank heater isn't cooperating wasn't fun last night.

Got some researching to do on all this

I ended up at a hair under 3000 miles before mine started yelling at me. That was about 4.5 gallons of DEF and ~200 gallons of diesel.

 

[Jody Treadway]

@Clubbs I have a collection of deleted items from a 2015 you're welcome to in the meantime. Was all 100% fully functioning and good. They're just taking up space in the storage area of my shop.
Lemme know if you want/need anything

 

[Clubbs]

Man, my last gallon of DEF went like 60k miles.......

Aren't you already tuned? A call to your tuner asking if they have any "off road" tunes would be one of my first calls.

Duane

I'm running calibrated powers emissions on tuning. They've been great, but won't offer any off road tunes. I do have an ez lynk already though so that's a plus.

I ended up at a hair under 3000 miles before mine started yelling at me. That was about 4.5 gallons of DEF and ~200 gallons of diesel.

I was towing and averaging 8.2 mpg, but still the percentages aren't favorable. Was hoping the 1100 degree egt after the turbo would help burn some of this stuff out... Still builds 30 pounds of boost and feels strong, but I don't know how much longer I'll have before it's completely constipated and sends itself into limp mode.

@Clubbs I have a collection of deleted items from a 2015 you're welcome to in the meantime. Was all 100% fully functioning and good. They're just taking up space in the storage area of my shop.
Lemme know if you want/need anything

We're heading to FL after Christmas and then up to banner elk before heading back to the coast. I don't think my route goes right by you. Let me figure out what date that is and I'll let you know. That would be awesome to have some cleaner parts or donor for a "stealthier" solution if my clogged parts get so heavy and fall off.

Y'all are all awesome

 

[Clubbs]

Just got the exhaust system fault go see dealer popup on my dash. Codes are P2028 reductant tank heater voltage and P244A particulate filter pressure differential too low bank 1.

It's about 12 degrees up here and everything is frozen. I did plug the block heater in and it started fine this morning, let it warm up a bit. Drove down the mountain to a sled hill with the kids less than a mile away. Got back in to drive back up the mountain and got the visit dealer warning.

Would think that differential pressure low would mean the dpf is flowing better than the ecm thinks it should. Hoping it's burned out and I don't go into limp mode on the way home tomorrow. I'll take it all off when I get home for an inspection...

 

[jeepinmatt]

Given that flow probably didn’t magically get better, it’s probably just a bad sensor on the upstream side showing a low/zero value.

 

[Clubbs]

Made it back to the coast with no issues. Visit dealer warning went off. DPF pressure delta via ezlynk would max at 5 psi at full throttle and go to 0 psi at light throttle. So both pressure sensors must be working presently. Egr position changes from 0 to 100% while driving so that apparently works too. Still consuming ridiculous amounts of Def - burned 1/4 tank in 350 miles home.

It'll get fixed next weekend.

 

[Clubbs]

Updates: Current odometer is 252k


When the truck was new in 2018 on stock tires I could ease it to 23 mph on my daily 75 mile commute.
Changed 33" AT's and it dropped to 21ish. Slowly got worse.
Six months ago went to 35" tires and averaged 18mpg
Coming home from the mountains last week all hwy I got 15.9 hand calculated (my speedometer is accurate with tire size). My next fill up this week was 15.8mpg. and that was all 55-65 mph.
Def consumption is about 1/3 tank of def per tank of diesel.

Exhaust pipe is hot as fire after driving- I think this thing is in constant regen trying to keep itself alive.

No more exhaust codes since I cleared them in the mountains.

Ezlynk says soot load is 0, and dpf delta is 0-5 psi depending on throttle position.

Loaded a new tune this morning and making some "hardware adjustments". I'll post back after testing

 

[Jody Treadway]

Updates: Current odometer is 252k


When the truck was new in 2018 on stock tires I could ease it to 23 mph on my daily 75 mile commute.
Changed 33" AT's and it dropped to 21ish. Slowly got worse.
Six months ago went to 35" tires and averaged 18mpg
Coming home from the mountains last week all hwy I got 15.9 hand calculated (my speedometer is accurate with tire size). My next fill up this week was 15.8mpg. and that was all 55-65 mph.
Def consumption is about 1/3 tank of def per tank of diesel.

Exhaust pipe is hot as fire after driving- I think this thing is in constant regen trying to keep itself alive.

No more exhaust codes since I cleared them in the mountains.

Ezlynk says soot load is 0, and dpf delta is 0-5 psi depending on throttle position.

Loaded a new tune this morning and making some "hardware adjustments". I'll post back after testing

I wish you were closer man. I'll give you everything I have here and you can fix it for a case of diet cherry sundrop

 

[Clubbs]

Still might have to take you up on that, because these seem to be defective

I'm no def expert, but I don't think this is normal

 

[Clubbs]

So... I think I have something arry in the tune because the boost gauge reads 12-13 psi at idle or engine off key on. Then it pegs the gauge when driving. Trans tune doesn't lock the converter soon enough, but that too can be fixed. I'll send in some data logs and see what can be done.

Mpg display is worse than it's ever been, maybe that's because it thinks it has 80000 psi of boost??? I dunno. Got a check engine light for a manifold inlet air temp (cleared it and didn't save it like a dummy)

I've got to tow pretty heavy Monday morning for 75 miles. All other vitals seem fine. Any thoughts on towing with boost data out of wack????

 

[Clubbs]

Parked it for a couple hours to eat dinner and clean up the garage. Started it up to move it back inside and boost gauge reads 0. Test drove and all seems "normalish" with boost pressure although it shows 37 pounds on boost in setting 4 out of 5. Timing was pretty weak on the first test drive and it maxes out at 20 deg btdc, seems low to me. Torque converter lockup needs to happen sooner and a few other adjustments, but that's sort of normal for a first pass. I'll send in some data logs and get the bugs worked out.

Mpg went up to 21 with the cruise on 60. Haven't seen that since 33" tires.

 

[CLRracer]

Since you flashed in a new tune I would put some stop and go miles on the truck to let the tranny do its relearn before towing. 50 miles at low throttle is what is usually recommended IIRC.

Duane

 

[Clubbs]

I wish you were closer man. I'll give you everything I have here and you can fix it for a case of diet cherry sundrop

Yup I concur and did the normal mileage today and will get another 100 in tomorrow. Was concerned about the boost gauge pegged and what that was doing to the ecm and fueling. I think it's better now that the boost gauge seems more normal although I don't know why it changed...

Only possible theory is I tuned before I unplugged stuff, maybe it got some weird calibration from some sensor it wasn't expecting and took a few miles a cel and resulting cel clearing to adjust to reality???

Either way timing isn't nuts so I don't think there's any risk here, but I'm also leaving power untapped with only 20 degrees of timing...

 

[Clubbs]

New tune, less parts. Truck felt sluggish, trans was shifting poorly and holding gears too long, black smoke, cel came on for a boost sensor periodically. And hardly had any timing maybe 10 degrees, and saw 37 pounds of boost.

Sent in some data logs and they had me running a file for a bigger turbo, changed that for my stock turbo and things are improving.

Exhaust brake is very laggy, don't like that. Boost is back down to normal - just below 30 max on SOTF position 3 out of 5. Still hardly any timing, 12.5 at 2800 rpm. Converter doesn't lock soon enough so 4th used to be freight train gear and now it revs like 1-3, come out of it, let the converter lock and it pulls hard or feels the same as the CPS tunes I had.

Left the pyro in the down pipe and I'm not really seeing much difference. Was sent the wrong plate for the exhaust pyro probe so waiting on the right threads to come in.

Mpg went from 14.2 on my last tank before the change to 19.1 on my same 150 mile daily commute so that's a win.

Got some work to do with the tuner. Just seems odd timing is so low. My cps tunes would pull 26 degrees and these CCS tunes aren't pulling half that. Any ideas? Seems I'm leaving power and fuel in the cylinder this way. Guess it's safe and all, but maybe too conservative?

 

[jeepinmatt]

New tune, less parts. Truck felt sluggish, trans was shifting poorly and holding gears too long, black smoke, cel came on for a boost sensor periodically. And hardly had any timing maybe 10 degrees, and saw 37 pounds of boost.

Sent in some data logs and they had me running a file for a bigger turbo, changed that for my stock turbo and things are improving.

Exhaust brake is very laggy, don't like that. Boost is back down to normal - just below 30 max on SOTF position 3 out of 5. Still hardly any timing, 12.5 at 2800 rpm. Converter doesn't lock soon enough so 4th used to be freight train gear and now it revs like 1-3, come out of it, let the converter lock and it pulls hard or feels the same as the CPS tunes I had.

Left the pyro in the down pipe and I'm not really seeing much difference. Was sent the wrong plate for the exhaust pyro probe so waiting on the right threads to come in.

Mpg went from 14.2 on my last tank before the change to 19.1 on my same 150 mile daily commute so that's a win.

Got some work to do with the tuner. Just seems odd timing is so low. My cps tunes would pull 26 degrees and these CCS tunes aren't pulling half that. Any ideas? Seems I'm leaving power and fuel in the cylinder this way. Guess it's safe and all, but maybe too conservative?

Sounds frustrating and oversold. At least the MPG has gone up. Every time I’ve done a “less parts” tune, it has been a significant difference in throttle response and driveability. I assume a by gawd Cummings should be no different. My derated 2017 Ram 5500 (325hp/750ftlbs from the factory) was deleted and tuned before I bought it, but at 11000 pounds it’s still faster and more nimble feeling than my stock 2019 Ram 2500 (370/850, ~7800 pounds), which is also still noticeably slower than the stock 2012 F250 that I had.

 

[Clubbs]

Sounds frustrating and oversold. At least the MPG has gone up. Every time I’ve done a “less parts” tune, it has been a significant difference in throttle response and driveability. I assume a by gawd Cummings should be no different. My derated 2017 Ram 5500 (325hp/750ftlbs from the factory) was deleted and tuned before I bought it, but at 11000 pounds it’s still faster and more nimble feeling than my stock 2019 Ram 2500 (370/850, ~7800 pounds), which is also still noticeably slower than the stock 2012 F250 that I had.

It's plenty peppy now, but so was the emissions on tune I had with CPS. Even hitting resume on the cruise control will toss your head back. Overall I'm happy with the tune, just needs tweaking, mostly on the trans shifting. And since this is a Randy's stage two it requires different pressures and tc lock points than factory, add in my personal preferences on top of that it's just going to take some iterations that the tuner, CCS, thus far is happy to accommodate.

I just don't know what to say about the timing. The CPS emissions tube would rattle if I got into it. This new tune doesn't rattle at all so maybe the first one was too far advanced. Overall power "feels" similar so maybe. This is in fact a better tune??? I dunno....