Do you have to prime fuel system on 5.9 cummins 2007 after filter change?
Yes, you generally need to prime the fuel system on a 2007 5.9 Cummins after a filter change. While some newer Cummins engines have automatic priming systems, the 2007 model typically requires manual priming. Failure to prime can lead to hard starting or no start at all. The specific priming method may vary slightly depending on the exact configuration of your truck, but it usually involves using the hand primer pump on the fuel filter housing until firm resistance is felt. Always consult your owner's manual for the precise instructions for your vehicle.