Somehow this thread has made it past me until tonight. Jody, I'm glad to hear your friend is having good results from the tuning that his friend did.
I hate to do it but I've gotta say a few things about the misinformation on this thread. I'm not a certified mechanic, but I've been inside more 5.9 and 6.7 Cummins Engines than most high ranking politicians have been inside interns. I can't say what other people have experienced, but I can say what I have experienced. I know a few people that have tuned and dieted (as in weight loss) trucks, and every one I've spoken to has gained at least 2 mpg. Hand calculated.
The EGR valve for a 2007.5-2018 6.7 Cummins has the same part number, and the cooler is the same from 2008 until 2018. So how they are cleaner? I'm not trying to pick on you or cause trouble. I just want to point out some facts. I've seen trucks with 150k miles that looked like that, I've seen trucks with 200k miles that didn't. There's a lot of factors that can cause the EGR to clog up. And the year doesn't matter. EGR is EGR.
