I thought the exact same thing. That 5.9 definetly had a tune or something on it. "The 5.9 smoked decently stock, while the 6.7 was squeaky clean"

yeah right!! Ive never seen a [truly] stock 5.9 smoke at all.

(not to take this off topic tho)

ben

 

Theres a gurl that drives around my town in a 06 and when she gets on it to pass someone it lets out a little smoke and i know that trucks bone stock (car show).

 

Legally you can remove the DPF off of your truck on a 2007. Look up the law for yourself. You have to keep the CAT on there. Only way you are breaking the law is by removing the CAT. Who started this illegal thing about removing the DPF is illegal on a 2007 is wrong. Maybe on a 2008. But we have spoke to our state about it here in Texas. What they said is you might not be able due to the monitoring system that is on the truck, and that it may not be possible if the dealer can not turn it off. They said that on a 2007 the CAT is illegal to remove along with any other year model that has a CAT.

Which is funny because DTR for the longest would not let you talk about something that is not illegal to remove on a 2007 but would let you talk about what is illegal to remove, So you could talk about removing a CAT which is illegal, ironic!!!!!!!!!

 

On the subject of the egr delete my electronic throttle control light comes on has anyone else had this problem

 

No skalleknull. They did not and have never allowed discussion on the removal of CATS. Removal of the DPF may not be illegal to the feds but in a state where diesels have to be smog checked you will probably have issues passing the inspection if the technician wants to give you a hard time....

 

When this happens do you also get a p0106 code and a CEL? Does it seem to studder every 15 seconds or so under steady throttle? If your answer is yes, did you recently pull through a drive-thru or something that required you to shut the engine off but not turn the truck completely off, remove key, allow all electronics to fully shut down before restarting? This has happened to me twice and both times that is when it happened. I think it is just the truck getting confused with the Edge clearing the codes twice while all the eletronics haven't been reset.

If this isn't your symptoms, have you disconnected the EGR solonoid harness? If not you need to do so, it will cause the truck to run like poo if you block the EGR, remove the butterfly, but leave the harness connected.

 

You guys are getting too specific. The federal emissions law states that it is ILLEGAL to remove ANY piece of emissions equipment that came on the vehicle from the factory. If, for some reason, a vehicle came out in 1954 with a prototype catalytic convertor and EGR system, it would be illegal to remove it. Plain and simple.

I personally don't see why everyone has been up in arms about legal/not legal regarding the DPF and EGR. We have been deleting cats on vehicles for years and nobody thought twice. The DPF and EGR provide a new challenge; the truck doesn't like to run right if you just pull it straight off. So, companies make products that allow us to do so. We yank the stuff off and drive down the road with a smile. There are those that have to deal with emissions testing in certain states, but those same states look for a cat on an older diesel truck so nothing has really changed. I think we need to stop worrying so much, do to our trucks what we are going to do to them (like we always have) and enjoy owning and driving them. Otherwise it just seems a waste of money to deal with any of them.

 

I want to do these deletes but I just don't know if I will unless I can figure out how to get through emissions testing without having to put everything back on the truck....
Now, maybe the makers of these downloaders can come up with a special "Emissions" program that we could use just to get through an emissions test. Something that makes the truck burn super clean just for a short period of time, even if performance was affected temporarily. If that were the case then the emissions guy may not even look under the truck to see if all the junk was even there. It seems like it would be pretty easy. If they can add a bunch of fuel why can't they take some of it away instead? Sounds like a great idea to me.....

 

i would think it wouldn't be that hard to pass the emissions test, but wouldn't most places do a visual as well? i can see faking your way past one without a cat, as lots of years of trucks came without one, but that DPF is pretty big for an inspector not to notice, and would figure he would know that '08's and up should all have one.

 

If you are running one of the fooler boxes then why couldn't you just hollow out your DPF and reinstall it like that? Wouldn't it do basically the same as the piece of straight pipe you get with these kits? The straight pipe still has the bungs for putting the sensors back in doesn't it? This would basically do the same as hollowing out a CAT where you get better flow but the housing still looks normal...

Man, I need to stay away from this topic because I swear my wife will kill me if I start shelling out the money for all this stuff! I'm already real close to making myself a liar and getting a downloader just to see if it will help mileage any........

And on that subject, what kind of EGTs are you guys seeing that just have a DL on your trucks but still have the EGR and DPF in place? I don't plan on racing, and I don't plan on guages, but I may have to run on the moderate/performance tunes to get the best mileage and I don't want to have to worry about the egts. My experience is that the tow tunes on most DLs don't give the best mileage gains like you would think they would...

 

wow i never even thought of that. i know plenty of people who did it to their cat, but i never even thought it might be just as simple to do it with the DPF- i guess i always thought that Al Gore was inside the DPF, keeping an eye on things.

 

i think the main reason to not gut the dpf is that if by chance you do need it in the future, that is one pricey ($3000 or so i've been told) piece of equipment to have to purchase.

 

All of us need to make a decision about what we need to do in our own case as far as emission's compliance goes.
I've had to deal with both visual & sniffer tests that can range from a joke to fairly stringent... and of course you can sure be at the mercy of the test tech. (Like the time I brought the GTO in for inspection/emission and they didn't want to sticker it because of no PCV valve and 3 carbs... Hello! Can you say OEM equipment! )

I get rid of the inefficient, power-robbing emissions stuff, but where possible I keep the vehicle looking compliant (sniffers usually aren't a problem due to clean operation).
The cat on my '05 is quite empty, but it's in place with a turndown welded on so it's Holey-ness can't be seen. I also weld header-style collector flanges on exhaust components that I need to quickly install for Sticker Day.

The part changes/mods possibilities for DPF, cat, EGR, etc. are readily at hand, but the ECM interaction issues are the main problem left to deal with. Since the ECM communicates via low-voltage signals, there are shortcuts to dealing with the deleted parts/systems short of re-teaching the ECM how to think.

We all love the "magic bullet" of programmers, and their ability to do so much - but all software still relies on hardware (parts) to execute...

 

Yes, gutting a DPF and using a fooler box would yield the same results as a straight pipe with the same fooler box. However, the DPF is around $3200 to replace and is VIN coded. There are precious metals inside the DPF that allow it to function (so I've been told by Dodge). I think a much better decision would be to take a piece of straight pipe and have a welder go to it to come up with the fake DPF. It wouldn't be an easy (or cheap) job but wouldn't be THAT difficult for a competant metal worker either.

As for programmers with the emissions equipment still in tact, i honestly don't think any of them give any fuel economy gains that make the cost of the unit justifiable. I have read reports of increases in fuel economy but sincerely believe most of them are looking at the overhead. Example: When I first got my Power Pup (i bought it for the ability to calibrate my speedometer to my tire size changes) I played with the tunes a little. I put the Pup in tow for 2 tanks of fuel (consecutively) then on performance for 2 tanks of fuel. The Tow tune showed a 2.6mpg increase by the overhead over those 2 tanks (as opposed to the stock tune with the speedometer corrected) but hand calculated showed an increase of only .3mpg. The Performance tune showed a 3.1mpg increase over the stock tune on the overhead but a .5mpg DECREASE hand calculated. I believe this is due to the fact that any little fueling or timing change causes more particulate to be created. This fills the DPF faster and makes you go into regen more. While the truck, when not in regen, may be getting better fuel economy than before, the regens are happening more frequently negating your gains.

On the matter of EGTs, this is another thing that makes me wary of programmers on emissions-complaint trucks. The emissions equipment makes your truck run HOT. I frequently saw 1100-1200 degrees EGT at highway cruising speeds when still stock and not in regen (this is with NO programs or downloads installed, stock power). In regen i would see 1400-1500 degrees on the highway. Add a programmer and you will only get hotter. Even stock the EGT's got too close to the danger threshold for my comfort. Now with the DPF and EGR gone, i cruise at around 650 degrees EGT but can hit 1400 degrees again in the blink of an eye if i am hammering the truck hard. These things get hot QUICK.

This is all just my opinion, so take it for what it is. Personally, i think you should either leave it just the way it is or delete the DPF and EGR FIRST. Then start looking at programmers/downloaders, whatever tickles your fancy. I am like you in that i am not a bench racer, street racer, drag racer, sled puller or anything like that. I haul crap with my truck, pull my race trailer (once i get another race bike to put IN the trailer, that is) and DD my truck. I don't care about 1/4 mile times, HP numbers, or any other figures other than MPG and $$ spent per mile on the odometer. As long as the truck is reliable and economical I am happy. I have the edge on level 5 because i get better mileage on level 5 than on level 0 and i already have the edge to clear codes so i might as well. i have the power pup on Tow because it gives me better mileage than on stock and i have it already to correct the speedo. I am thinking about selling both of these and buying a PMT because it does what both the Edge and Power Pup do. If so, i will find which tune gives me the best mileage on that and run that. If stock gave the best mileage, i would run stock. Stock power is more than enough for my needs so mileage and reliability is what matters to me as it sounds like is also the case for you.

 

You know, this really got me thinking this evening. The Cat on a 5.9L looks strikingly similar to the DPF and Cat on the 6.7L. What if we grabbed a couple of 5.9L Cat's from a junkyard, hollowed them out, and welded them onto a straight pipe on a 6.7L? Honestly, would any of the guys at the local inspection place figure out that it was a Cat and not a DPF?