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Have you been going to this dealership since the problem started ? It looks like they are intelligent enough to atleast dig deeper into it than most. Maybe they have found some of the problems that alot are having. Looks like they are seriously trying to find what the problem is and not just throwing parts at it. I too wonder if it’s injectors leaking or the programming.
Yes, I use them for all my warranty work.
STAR isn’t a maintenance program. It is the technical assistance center for all of the dealerships to use as a resource for help fixing issues that are more difficult than the routine and well-documented repairs or issues.
Have you checked to see if it’s still making oil ? Sounds like you have an internal fuel leak from the HPFP or an injector or etc.
I would think that the long periods of idle time in sub zero climates is adding to your fuel dilution. While high idle is preferable, you’re still operating the engine in an unloaded state in very cold weather. Without a load on the engine, and with temps that low, I would suspect the in-cylinder temperatures are still not desirable for complete combustion. It’ll be interesting to see how things go moving forward now that the DPF has been replaced. A lot of idle time in cold weather can face plug the DOC
My local dealer isn't very impressed with the STAR techs on diesels. He claims they're clueless.
From everything I’ve seen while monitoring some of the major issues with these trucks over the past several years, I would concur with your local dealer.
Without a regen i am at 19hrs and 375 miles. By the looks of it I'll be having a regen within soon based on the dpf gauge. Showing 4G of soot currently and probably won't passive on my drive home on the highway tomorrow. Oil level has not changed. Over the last few weeks it's been cold enough the truck has been high idling on its own when started. -20F air temp for several days in a row.
19 engine hours and 375 miles works out to an average speed of 19.7 mph. You must be doing a lot of idle time or slow speed driving?
Currently yes. Extreme cold temps and lots of slow city driving are the cause. Haven't been pulling my sled trailer with this truck due to the quad cab sucks for 4 guys. Have a buddy with a megacab so we've been taking his truck.
It’s pretty amazing you’ve been able to achieve 19 engine hours on that low of an average speed. That’s not typically what I’m used to seeing on trucks with very low speed / long idle type duty cycles.
Mine is showing 850 DPFDIS and when I hand calculate based on my independent, manually recorded records, I’m calculating 863 miles between cycles. So the iDash is actually showing pretty close to the same amount. The time value is also close in agreement.
