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Message: [QUOTE="JD3020, post: 56146, member: 373"] Thats what i was afraid of but Nate listened to it and he thinks it sounds like an injector or two not firing right. Truck doesn't use any oil and IMO the blow-by looks pretty normal. My original injectors were shot when i pulled em out, one nozzle was covered in carbon. These AD's looked good, but were pulled out of a used motor that i know nothing about. I put them in knowing they could be just as bad. It just has a lopey idle(tach doesn't move), and a slight vibration between 1500-2k rpm's, and a slight miss at all RPM's. Runs rough when its cold, but as it warms up it smooths out. If i drive it fairly easy it generally runs smooth, if i'm running it hard it will run a little rougher. And randomly some days it will run smooth and other days its rough. IMO if it was internal issues it would be more consistent. It also can change depending on what tune i'm in or how much throttle i'm giving it, but there is always a vibration. To me everything points to injectors. One of these days i'm gonna get the HPOP and IPR off the spare motor and throw in my truck also, then work on my DIY Gen 3. So hopefully my mods will cure my issues. [/QUOTE]

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