I was at a local exhaust shop yesterday. The guy said he would make me a pipe to delete the DPF.
He is getting the Flanges from the muffler to the flange in front of the DPF.
I have the Quadzilla so I could turn the DPF off. I just want to save my Waranty. I want to be able to take it into the dealer for other things and still have pretty much stock exhaust. I think they would not even look. If I want I can put the DPF back in at any time. 6 bolts and done.

Has anyone tried to just put the probes back into a straight pipe.

Last time I was at the dealer. I was looking at the screen on the gm Scanner. After a regen it had 2 lbs of pressure reading on both probes.
So if the probes are just getting the same reading all the time will it never regen or throw a code?

there is quite a bit of information on this to be found in the LMM section. but to make a long story short, turn off the DPF when you remove it. the computer will recognize that it has not had a regen in a long time and will throw a code at that time. Think of it this way, if you have to go to the dealer than you would remove the tune with the quadzilla so take the extra 15 minutes and re install the DPF then no questions asked.....

Someone correct me if im wrong. But i believe that the DOC is designed to work directly with the DPF. In other words, I think that you have to remove the DOC and the DPF as well, but i could be wrong. Why not just remove the whole thing? Essentially all you will be doing is turning your truck into a LBZ with a LMM body.

Also if you took the probes out of the DPF and put them in the straight pipe, you would lose the option of switching back and forth.

Don't make it hard on yourself, come over to the dark side...

So can we confirm. Even if you run the probes in the straight pipe. It will still throw a code because it has not regened in a while.
I got shot down in my past posts because You guys told me Regens only happen because of soot and pressure in the DPF.
So it is also bassed on time and or milege.

Regens only occur based on soot mass. I understand why you would want to put the probes in your straight pipe; possibility of no codes, dealer not finding out you took off dpf, yada yada yada. However when you remove all the sensors from the dpf you eliminate its ability to communicate with the ECM and its ability to regen. If you put those things in your straight pipe and for some reason it decided to regen there would be nothing stopping it. Just a fyi and something for you to consider... Might be easier for you to go through a small potential hassle at the dealership than throught all this headache with exhaust fab, but ill stop with my input

I would assume it would still throw codes because the probes would be outside of their peramiters. May i ask your desire to put the probes back in?

I would assume it would still throw codes because the probes would be outside of their peramiters

BINGO

I've been thinking about removing the DPF and muffler with a straight pipe also. But I would just turn it off with the Quad. That way with a couple of bolts it could be reinstalled for smog testing. Shouldn't take that much time to bolt DPF back on and reload the factory program. I just wonder how much would I give up leaving the DOC installed.

The GM scanner said I had 2 lbs of pressure going in and 2 lbs going out 13 miles after a Regen.
You say soot mass. Then how is that measured. Is there soot hanging on the probes .I would think If the probes are giving a reading of 2 lbs its measured off of pressure before the DPF and after.

Just so everyone understands I understand the straight exhaust and Quad works.

I just want to know has anyone put the probes In a straight pipe and ran the stock programming. Just wondering what happens. The results of this will tell us if its only reading the probes (soot mass) or is there a timed period with no regen that it will still throw a code.

I may be wrong but I belive that after a period of time the unit will go into regen anyway. That its based on multiple input and not just the pressure of the exhaust. But I would like to know for sure also. I would like to come up with a way to remove and then reinstall the system with ease.

I may be wrong but I belive that after a period of time the unit will go into regen anyway. That its based on multiple input and not just the pressure of the exhaust. But I would like to know for sure also. I would like to come up with a way to remove and then reinstall the system with ease.

Weld in on of these suckers right between the downpipe and the OEM exhaust system...

http://www.thunderracing.com/catalog/summaries/s168_large.jpg

When you want a straight pipe just open up the cut out, disconnect all the wiring harnesses from the OEM exhaust system and install a tuner to block the check engine light.

When you want to go back into dealer mode plug everything back in, put the cover back on the cut out and then take of the programmer.

Thats the easiest thing i have ever though of.

is it possible to remove the dpf with a replacement pipe and run the dpf delete on my PPE tuner? and just seal up all the sensors so they dont get wet and damaged...?

is it possible to remove the dpf with a replacement pipe and run the dpf delete on my PPE tuner? and just seal up all the sensors so they dont get wet and damaged...?

Yes.

Yes
But thats not what Im asking.
Why seal up the sensors. Put them back into some bungs welded into the delete pipe. And you dont need the tuner.
Has anyone tried it yet.
Im suposed to meet up with this exhaust guy on thursday he should have the 3 bolt flanges and the probe bungs by then.
I guess Ill do it first.

Yes
But thats not what Im asking.
Why seal up the sensors. Put them back into some bungs welded into the delete pipe. And you dont need the tuner.
Has anyone tried it yet.
Im suposed to meet up with this exhaust guy on thursday he should have the 3 bolt flanges and the probe bungs by then.
I guess Ill do it first.

You still will need tuning because your truck will go into limp mode for not regening. It senses when its been too long without one.

You still will need tuning because your truck will go into limp mode for not regening. It senses when its been too long without one.
Exactly my point the Regens are triggered by soot mass. Ok I got that.
But if you have no soot mass (removing it)then its based off milege or time. It then sets a code.

Can you also confirm you yourself or someone has tried it. without programming and with probes installed in delete pipe.

Exactly my point the Regens are triggered by soot mass. Ok I got that.
But if you have no soot mass (removing it)then its based off milege or time. It then sets a code.

Can you also confirm you yourself or someone has tried it. without programming and with probes installed in delete pipe.

I am also working on going down the delete pipe road. So much easier for service. I will be plugging my connections and running the DPF delete tune.

it works off of multiple parameters. Including soot mass, mileage and/or time since last regen! Basically squaredaway, your idea will not work.

Exactly my point the Regens are triggered by soot mass. Ok I got that.
But if you have no soot mass (removing it)then its based off milege or time. It then sets a code.

Can you also confirm you yourself or someone has tried it. without programming and with probes installed in delete pipe.

it works off of multiple parameters. Including soot mass, mileage and/or time since last regen! Basically squaredaway, your idea will not work.

X2 it will not work. There have been people on here that just straight piped there trucks and were fine with just a cel for a while until they went into limp mode for not having a regen in xxxmiles

x3 but hey try it out and if it works great but im 98% sure tht the truck will atempt to regen at some point and you will be dumping raw unburned fuel and get a crap load of white smoke. i have seen the dpf elctrical schematic and its very complex and there are alot of permaters involved

Ok I believe you guys.
In the past I asked about miles and the regen system.
I got shot down that it only reads Soot Mass.
Just remember since Im running 37 inch tires. Dont you think this could affect the regen process. Like it might want to regen more often.
I think it reads soot mass first then it looks at miles it has traveled and has or has not regened.
If this is correct anyone running bigger tires than what is programmed in your truck could be Regening more often. In turn throwing codes and limp mode.
And maybe this is why these trucks have such a sparatic MPG from one truck to the other.

squaredaway,

I don't know if the bigger tires necessarily have an effect. But what does... is that 90+% of us that do have the bigger tires are also running programs of some sorts. These in turn produce more smoke, which clogs the DPF faster, which causes more regens!

squaredaway,

I don't know if the bigger tires necessarily have an effect. But what does... is that 90+% of us that do have the bigger tires are also running programs of some sorts. These in turn produce more smoke, which clogs the DPF faster, which causes more regens!

Really. Glad you clarified that for me. I had no Idea a program would produce more Soot mass. Oh is that what all the smoke is when guys with diesels floor there trucks. So they must have a tune. Hmm. I did not know this. Stupid me.:rolleyes:

x3 but hey try it out and if it works great but im 98% sure tht the truck will atempt to regen at some point and you will be dumping raw unburned fuel and get a crap load of white smoke. i have seen the dpf elctrical schematic and its very complex and there are alot of permaters involved
So what triggers the Regen if it is straight piped? I would assume one of the other parameters. And if you have seen the schematic what else triggers it besides soot mass.

I want a DPF delete pipe! If anyone knows a shop that wants to make me one, shoot me a PM, I'll buy it!

I have a DPF back exhaust now (just for looks as I hate the factory tip), then will bolt in a pipe in place of the DPF and get a tuner to turn off regen. If I want to take it in for work, bolt the DPF back in and put stock tune in, should take 30 minutes or so to have it back to stock. Anyone who uses the 06 exhaust to delete it all will have a lot mroe work to do to put it back. The only down side I see is still having the DOC in place but how much can that really matter????

I would also like one...

thers alot of restriction in the doc

ok if it goes by soot why was the dealer reading preasurs?

Why would it regen after so many miles?? What would it be regening?? If you drove around for 5 years and never replaced tires on your truck because they still had good tread, would you replace the tires?? If there is no pressure differance, then there is no build up of soot, then why regen and what would it regen for??

Ok Meeko,
I dont understand if your trying to be a smart ass or you are actually asking a question.
Do you have some knowledge and facts or are you just looking to add another post to your sig???????
If you run the probes in a straight pipe. The soot mass will never reach its limit. But for some reason the computer on theses trucks are still Regening.

So instead of your tire coment (like we are all stupid). Why dont you tell me why they are regening. What triggers it??????????????? oh here is one more?

Has anyone tried to just put the probes back into a straight pipe.



Yes, a friend of mine had a shop cut the DPF out and weld a straight piece of pipe in place. He left the sensors in place, using your theory about the pressure being the same so no regen.....wrong. His truck still regens and he has a SES light. I dont know what codes he has, we plan on getting EFI and eliminating the light...

Bottom line.....it doesnt work

Ok
A WINNER.
An actual test.
Dose it work for a little while then it regens?
So the comments I get that it only reads soot mass are WRONG.
It is also bassed on miles between Regens.

Also If this is the case. Just a thought. If you are running bigger tires like I am and no programmer then you could be affecting the DPF system. This just a thought no proof.

he said the light came on after a few days....then stayed on.
He says it regens about every three days or so.
He has 285's on it...came with 265's so they arent that much bigger.

hope this helps.

Ok Meeko,
I dont understand if your trying to be a smart ass or you are actually asking a question.
Do you have some knowledge and facts or are you just looking to add another post to your sig???????
If you run the probes in a straight pipe. The soot mass will never reach its limit. But for some reason the computer on theses trucks are still Regening.

So instead of your tire coment (like we are all stupid). Why dont you tell me why they are regening. What triggers it??????????????? oh here is one more?

No smart ass here, just questions. I have no knowlage of anything besides the fact that you dont do something, regen, if it is not needed. I could care less about my post count, thats just a dumb thing to say. I was just adding more fuel to the fire until someone has PROVEN that it will work or not. You talk like you know all about it and thats fne, I dont and if the truck goes into regen even when not needed, what is it regening?? That is a true and for real question. Does it regen for .2 seconds then stop because the levels were within parameters?? Maybe it is NOT regening at all, it just sees that no change at all in the pressure so it sees something is wrong. How do you KNOW if it is regening or not?? If you see you CEL than doesnt mean that it is regening, it just means that iot sees a problem. The original question was, "will it work" and nobody answered it until now. I just dumbed it down a litle bit. Can someone answer this, If it runs off milage and time since the last regen, but the pressures are the same on each side of the dpf, what "soot" does it do and what is it regening??? Again, not being a "smartass", just being me.

he said the light came on after a few days....then stayed on.
He says it regens about every three days or so.
He has 285's on it...came with 265's so they arent that much bigger.

hope this helps.
What dose it do when it Regens. Just the check engine light comes on the dash? ( could just mean it has not regened in a certain ammount of mile or time and triggers the computer for an error).
It might not be regening. Just giving a Check engine light
I have others tell me it still dumps fuel and white smoke out your exhaust.

The SES stays on all the time.

He says it goes thru regen and his MPG drops way down, just like when the DPF was still on.

I will have to ask him about the white smoke.