An intermittent miss in a Cummins 5.9L engine could be caused by several factors, including issues with fuel delivery, such as a clogged fuel filter or failing fuel pump. Additionally, problems with the injectors, such as wear or blockage, can lead to inconsistent fuel spray. Electrical issues, like faulty sensors or wiring, may also contribute to the problem. Lastly, a vacuum leak or compression issues could lead to misfires, resulting in the engine running unevenly.
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