DEF Warning in F350
While on a trip a message popped up "def range 400 miles." When I got home the next day the message was down to 200 miles. I added DEF but the message remains. I'm down to 100 miles and worried that...
Forum Discussion
07PSDCREW wrote:jus2shy wrote:
Pretty much, the old non-DEF system had to balance EGR intake to account for both, NOx reduction and Particulate matter reduction. With the introduction of DEF, they no longer used the EGR system to account for NOx reduction (letting the engines actually run a little dirtier/leaner NOx wise like they used to). So the EGR system was only used to reduced particulate matter formation. Hence, less EGR intake and cleaner oil.
Offroad diesels have it better. They have a slightly laxed emissions standards (not by much), but just enough where they could dump the DPF. They still have to use DEF though to meet their emissions limits. Bobcat
Deutz
Caterpillar
Perkins
It's too bad they can't quite meet the emissions for on-road vehicles. I think the most troublesome system though is the EGR because it feeds soot back into the engine. I would rather live with a DPF than an EGR system if given the choice.
Sorry to say guys but all 3 brands have an egr system. Here is a failed egr cooler out of a 2013 f350 6.7. If you are looking at the 6.7, the egr cooler is located on top of the passenger side head.
Yep, hence why I wish we could just live with a DPF and SCR system and toss out EGR. But it's still necessary with current technologies. Any word on how much idling is on that EGR? However, EGR usage is greatly reduced. Pre-EGR RAMs required EGR servicing at 67,500 miles. Now it's not even in the manual anymore.
