My 2008 6.7L is in "Limp Mode" for the 5th time this year... enough!

[InfiniteVista]

I’m done. My 2008 6.7L keeps clogging the DPF every 2,000 miles. I’ve cleaned the EGR valve twice, but it’s still acting up. I’m finally going to do a full delete. For the guys who did it years ago, are you still passing your state inspections, or did you just say screw it? Also, any recommendations for a tuner that actually works on these early 6.7s?

 

[TitanTorque]

I deleted mine in 2015 and haven't touched the engine since. It’s like a different truck. Best investment I ever made.

 

[CanyonCrawler]

Don't just do the delete, do a full EGR block-off kit too. That EGR system is what’s killing your intake air.I use the Mini Maxx tuner, still runs strong after 100k miles.

 

[DieselDrifter_TX]

The '08-'09 6.7s are solid motors once you wake them up. You need a clean tune that monitors EGTs properly. I’ve been running a custom tune + exhaust delete for 50k miles and it’s bulletproof for daily driving.

 

[InfiniteVista]

Don't just do the delete, do a full EGR block-off kit too. That EGR system is what’s killing your intake air.I use the Mini Maxx tuner, still runs strong after 100k miles.

Thanks for the reminder! I was only planning to fix the exhaust, but after hearing what you said, I definitely need to get an EGR block-off kit. That carbon buildup has really damaged the intake manifold. Is it still possible to find a reliable Mini Maxx kit? Or has everyone switched to custom ECU tuning these days?

 

[InfiniteVista]

The '08-'09 6.7s are solid motors once you wake them up. You need a clean tune that monitors EGTs properly. I’ve been running a custom tune + exhaust delete for 50k miles and it’s bulletproof for daily driving.

You're right, the word "wake-up" is so apt. I'm also worried about EGT getting out of control, since I drive this car every day. If yours has been stable for 50,000 miles, could you DM me and recommend which company's Custom Tune you're using? I don't need those "ghost fire" programs that produce smoke; I just need a tuning that allows the engine to breathe smoothly and is reliable for daily driving.

 

[StaticFriction]

If your DPF is clogging every 2,000 miles even after cleaning the EGR, the emissions system might just be the victim, not the criminal. You need to check your injector balance rates or look for a sticking turbo nozzle. If the engine is running rich or burning oil, it will produce massive amounts of soot that will choke a DPF instantly. Deleting it will stop the limp mode, but if you have a leaky injector, you’re just going to start blowing thick black smoke and potentially wash your cylinder walls. Fix the root cause first.