Good Morning all
I have a 2019 Kenworth T800 with a Cummins X15. The engine has a knock when under load at about 1400 to 1500 rpms. To me it’s sounds like a fuel knock from a bad injector. Put it in the kenworth dealership shop they suggested an overhead and changed out DPF sensors, and the knock is still there. My question is how do I identify which cylinder has the knock because I’m sure it’s a fuel related knock only the mechanics at this shop can’t figure it out.
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