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Message: [QUOTE="jngreen, post: 1080589, member: 679"] This is my friend's 05 6.0 I'm trying to help him fix. He went fishing this weekend, towing his boat, and the truck ran great as always. He then switches tunes with his SCT programmer from his tow file to his street file, and his truck starts acting up. It starts to misfire, run rough, and throw injector circuit low codes (P0261 and P0264) on cylinder number 1 and 2 only. He tried to return back to his tow file, and now the truck won't start. I admit that I am 6.0 "dumb" but I have done a little bit of research in the last hour or so and am thinking it is the FICM, injectors, or wire connectors at the FICM, injectors, or somewhere else in the harness. Let me know what you guys think, is there anything simple we could look at and test before we tow it to a shop? Also, not that it really matters, but he took it to Dave's Diesel in Muncie probably a year or two ago and they supposedly replaced the FICM when he was having similar issues. My friend will tow it back there unless we can figure it out ourselves, or can find somewhere better to take it. He lives in Elwood, IN. [/QUOTE]

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