Originally Posted By: TiredTrucker
#1... Wrong. At most a civil penalty, irregardless of a pickup truck or a semi truck. Nothing is removed or blocked. No components are tampered with. Doubtful anyone who was checking could actually tell anything changed.
True on the civil penalty, but (apparently) unlike you, I have no desire to give the government an additional $37,500 of my money if found guilty of emissions tampering. However, what I really meant is that it is "criminal" to modify an emissions system to reduce its effectiveness in the search of gains--be they power, MPG or otherwise. I can remember the days in Houston where a brown fog hung in the air for hours during the morning commute. I prefer not to breathe that air which is why I will not modify my emission system--it all adds up and it is the rare occasion when someone only disables the EGR on a diesel.
Originally Posted By: TiredTrucker
#2... Only if power levels are changed, so, no EVERY single tune does not do as you describe. And smoke would only occur if DPF system also removed. I only mentioned shutting off EGR completely via ECM, not trying to blow the heads with power changes or setting up a rolling coal scenario. EGR does not open all the time anyway. Under certain power and altitude conditions, the EGR is left closed as part of the original OEM tuning with EPA blessing. A modified tune as I am suggesting would just leave it closed all the time.
True; except in every online forum I have visited, no one stops with just an EGR "modification" most, if not all, disable or remove all of the emissions systems.
Originally Posted By: TiredTrucker
#3... No removal of parts. All emission components left intact and operational. Any tune would only stop the opening activation of the EGR, not delete it. OEM tune easily restored prior to having dealer work done on the vehicle.
We both are preceding from the knowledge of our respective vehicles. You with GM and me with Ford. In my case, it matters not if nothing was removed. Ford can absolutely tell if the PCM has been modified in any way--even if the OEM tune has been restored and this can/will void the warranty.
Originally Posted By: TiredTrucker
#4... Tune easily removed for resale. Original OEM tune reinstalled.
True; if that is all that is done--which is not the case more often than not. **Most** people remove the DEF system to reduce weight/eliminate the need for DEF and the DPF/SCR system as well and install a full blown programmer with multiple stages of tunes--normal, towing, performance, coal rolling, etc.
Originally Posted By: TiredTrucker
#5... Most not much more than $500 for what I describe... a simple code change to shut off EGR activation. EGR de-activation (also known as a EGR disable) is probably the easiest of all code changes to an ECM and the least problematic. There are more problems with EGR function as designed.... increased soot loading of the engine, EGR cooler developing leaks and introducing engine coolant into the cylinders via the intake. Many times necessitating a engine overhaul.
Except that most people do not only do this as I said above, they do not stop there. In addition, (at least in Ford's case), the problems with the EGR cooler seem to be fixated on the 6.0/6.4 platform and not so much with the 6.7 platform. I cannot speak to GM or Dodge's state of operation.
Originally Posted By: TiredTrucker
You really need to do a little research and find out what is going on in this arena. A good area to start is this link. It describes various techniques of approaching EGR. I am referring to a EGR disable.
http://www.kennedydiesel.com/docs/Durama...GR%20Delete.pdf
I do not need to do any further research. I have read all about the gains, but more importantly the losses, associated with modifying emissions systems on modern diesels. I will not waste my time or money and place my vehicles warranty at risk by tampering with the emissions/PCM. You, of course, are free to do whatever you like.