Does anyone have a diagram or info on the fuel injection system for a New Holland L553 skid steer?
I found a service manual that includes the diagram. I will upload it soon.
Make sure you check the fuel lines for air bubbles; it can cause misfire issues.
Try to get an OEM manual. It helped me a lot with my L553.
I had similar issues, and it turned out to be the fuel filter. Make sure it’s clean.