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This sounds crazy, but I have a 2010 FRTL with a 871 cummins. When you start accelerating at about 1200 rpm's it feels like you may have a clogged fuel filter.(ive changed that) When you pull a grade the check engine light comes on and the truck runs fine. When you cut the truck off and start to run again, same thing. Skips at around 12-1300 rpms check engine light will come on, and the truck runs fine. I don't have insight software, but have use a Scangauge D and got 3 codes. 254-5-0 135-11-7 and 64-0-0. anyone have an idea? Thanks

I tried to run your codes on quickserve, they came back as invalid... So I am thinking those are Freightliner codes not Cummins... Have you called the dealer and asked them to decipher codes? Also, do you have a Turbo Boost Gauge and Pyrometer on that thing? If not, get them. They are not that difficult to install.

Mine did that once, turned out to be bad injector