Having removed the dpf a few months ago the EGR no longer served any useful purpose so started looking at options. They ranged from just placing plates between the EGR unit and the intake horn to removing everything between the exhaust and intake side. All required the removal of the butterfly valve in the intake horn.
Just learned from reading on another site that it is possible to disable the EGR function by simply unplugging the electrical connection. Something to do with the most recent flashes allows the butterfly to default to open and completely shuts off the exhaust gases within the EGR unit when it is unplugged. I did this a few days ago with the following results.
1. Exhaust gas temperatures dropped about 100 degrees.
2. Smoke on hard accelerations stopped.
3. MPG on the overhead went up by 2 mpg above normal.
4. CEL is on. Codes P0405 and P0489 are active. They have on no affect
on how the truck runs.
5. Warm up in the morning takes longer, similar to my old 5.9.

 

I have a stock 2008 Laramie,6spd,3.73,QC. It seems that all I need to do is unplug the EGR plug. Can you tell me exactly where it is located? I have been anticipating to go the filter delete pipe etc. However, if I do not need to do that I won't. I miss my old 5.9 period.

 

HMMMMMMMM subscribe

 

what does the butterfly valve do? Where is the exhaust brake at?

 

The EB is incorporated into the turbo. The butterfly is in the intake manifold. Some say they simply unplugged the wiring going to the EGR and that alone helped their trucks tremendously. Others claim big problems with trying to do this with out removing the butterfly in the intake...
I haven't looked into it deeply enough to find out exactly what that butterfly does and why it needs to be removed from the intake....

 

Picture in this thread.http://www.cumminsforum.com/forum/6-...our-egr-8.html

 

OK so i just read the 9 pages of that with half people getting the valves backwards lol so they are just unplugging the EGR and NOT THE BUTTERFLY VALVE right?

 

LOL. I was quickly reading through it and I got confused too. I still don't know for sure what these guys are doing or not doing......

 

correct, i unplugged mine last week. Have had good results thus far. The butterfly valve is in the intake horn. It closes off the fresh air when the EGR valve is open, thus only allowing the EGR air into the engine. When the EGR closes, the butterfly would open back up allowing fresh air into the engine... that is the purpose of the butterfly valve.

With earlier flashes, the butterfly valve would default closed (only allowing EGR air) when the EGR valve was unplugged. With the newer flashes it appears to be the opposite so ppl are having good luck thus far, still being tested

 

Ya they were calling the EGR valve the butterfly valve and etc i was yelling at the computer cause they were getting it backwards DONT READ IT LOL it will confuse you. Bottom line is unplug the EGR on top of the intake horn. You will get less smoke and more MPG. You dont have to mess with the butterfly valve(too much work IMO). If you unplug it and your truck runs bad its just your butterfly valve closing....plug EGR back in go to dealer have them clear the code or get a code clearer of some sort and runs fine. If you wanna continue running with EGR unplugged go to dealer and get the newest flash done and it will allow the code to be a soft code and keep butterfly valve open.

Sean

 

My question that nobody can tell me why when you delete the EGR and cooler you smoke will be less????????? WHY? I figured with it not being burnt a second time it would be more sooty.(Lack of words to say)

 

More fresh oxygen pumped into the cylinders=more complete (cleaner) burn.

Sooted up EGR air being pumped into the cylinders=crappy, sooty exhaust gunking up the engine, turbo, DPF, etc.

 

Do you have to have a DPF delete to unplug the egr or can you do it with the DPF still on and functioning?

 

Some are running with a DPF and the EGR unplugged for several months. Try it if it works great if not just plug it back in.

 

I think that at worst you will eventually get a "CAT FULL" message in the overhead and you will have to get out on the highway for an hour to burn it off.
I'm thinking about trying this out this morning to see what happens. I'm not sure which flash my truck came with but it would have been the latest one as of March of this year...