First let me say, I'm new to diesels. The truck would auto regen on its own around 50-55% DPF. I was playing in Forscan and performed a manual regen with the DPF @ 40%. Since then my mileage has dropped from 19-20 MPG to 16-17 MPG and the DPF stays mostly a 0%. I noticed one time it had gone to 20% and went into another automatic regen (I could smell it when I stopped) and the DPF went back to 0%. Since I performed the manual regen I have put about 350 miles on her and still very different than before. Any help would be greatly appreciated.

 

for the 2023's can you disable the auto regen function?

Do you have the DPF soot % screen enabled or the 2023 might already show that display?

 

I do have the DPF%. I can't find the Auto Regen disable function.

 

For 23+ the autoregen disable function is not operational yet

ZooDad

 

Thanks ZooDad. I tried using the settings on the spread sheet for Auto Regen Check box. I don't think I did it correctly because in the IPC module 720-07-02 add 8 to XXX# my number was 2. I wasn't sure if I carry the 1 or just make the last numeral 0. Original is 0F42. Would it be 0F40 or 0F50?

 

Hexidecimal as it applies to AsBuilt values
0-9
A-F
in a continuous line. No carry over (A = what 10 would be)
once F is reached you start back at 0

ZooDad

 

You are getting 16-17 in the highway?

My 21 F350 6.7/3.55 got 20-21 on the highway but averaged 16.5-17.8 average mpg in every day driving.

Don’t mean to be nosey, just curious as what you mean when your mileage dropped 3 mpg. During regen I felt like mine was getting 10-12 mpg for a few miles, not 16-17 mpg.

Are you using the PM-22-A fuel additive? That was an easy 1 mpg less when I didn’t use it.

 

I run pretty much the same roads every week. Tuesday I go North, Wednesday I go South, Thursday and Friday I go East. The traffic is pretty much reliable on a mix of 55-65 MPH back roads mixed with morning traffic backing up at the lights. I do run heavy with all of my tools and parts. I just think it is really odd that the mileage dropped and the DPF has not gone to its normal 50-55% then go into regen. It went to 20% once and went into regen. Actually thinking about it, it has been more than 350 miles. Probably closer to 600. I don't use any fuel additives. I'm comparing apples to apples.

 

No worries, just was asking some questions. My normal driving was also back roads and highways, 45-55 mph roads and I could get close to 18 unless I was really trying. Considering a regen happened once, sometimes twice, and it would tank mpg in just a few minutes, would just make me think if it was stuck in regen you would be getting much lower.

I have never messed with regens in forscan but maybe it is just coming on more often than designed due to a changed setting. I.e. regen’ng 4-5 times per tank. Hope you find a solution and thanks for the answers.

As far as the PM-22, I found in my driving that for $1.50 added to every tank, saved me $8+ in fuel. Just my experience and of course YMMV.

 

Just out of curiosity, why would you f with the regen settings on a ‘23? The programming is heads and shoulders better than the 17-22 models. Don’t get me wrong, I’ll delete eventually because I can’t stand the EPA, but it works flawlessly. I wouldn’t touch the factory programming. What gives?

 

I didn’t change any of the programming. I did a manual regen out of curiosity.

 

I gotcha - sorry that didn’t work out alittle better for ya… dang ole curiosity got another one!

 

My truck regens just like yours all by itself (starts when it wants, rarely at 100%). When it goes into regen, my MPG drops a similar amount. That is all normal stuff. My truck has done that since new and I have 6,000 miles on it now.

Your truck does better than mine at MPG. I get 14 mpg doing mixed driving, maybe 15-16 straight freeway. I get 7.5 to 9 mpg while towing my camper. The dash is always 1.5 - 2 mpg above hand calculated except when towing, it is exceptionally accurate when towing (within a few tenths).

 

This last tank full wound up being 18.2 MPG (indicated and verified doing the math). I pulled an empty 2000k boat trailer for 1/4 tank. So the mileage has come back up. The DPF went to 30% today and when I had to get on it to merge with traffic in went into auto regen. It was back to 0% within 3 miles once it started.

 

what is the distance between regens?