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  1. B

    LMM 1 cylinder high injector pressure only when cold and smokes

    I have a 2010 LMM Duramax. When the truck is below 180 +- deg. It idles rough and has one injector pressure (#8) at about 7mm. It smokes really bad as well. Once it’s warm it runs great. New injectors. And I took the one injector (8)with high rate and switched it with another (6) and problem...
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