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Thread: Lly duramax runs good when cold but runs and idles rough when engine warmed up

  1. #21
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    May 2017
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    Quote Originally Posted by bronson1376 View Post
    So no luck with my issues, have you figured out what it was on the truck?
    NO i haven't . I put it on hold last year because my dump box broke and i got a new one . They took most of the summer to replace it so I will up date you in a few months when it goes back on the road. Any news on yours?

  2. #22
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    bronson1376,
    I did a return test on my injectors and found that 3 and 6 are returning fuel twice as fast as the others . So injectors for those will be here shortly . I will let you know how I make out .Any luck on yours ?

  3. #23
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    I am at the same point with my 2005 LLY, the CTS2 said injectors are way out of specs and I just replaced the FPR and working on the injectors to try to fix this same issue, please let me know what you came up with

  4. #24
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    Replaced all 8 injectors it run fine now .

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