Keven,
You need to open the air purge valve; it is located on the filter housing above the secondary fuel filter. It’s hard to see (painted yellow) and hard to get too. Use your remote starter switches and crank the engine until you get a good fuel flow. Don’t crank for more than thirty seconds at a time and cool for two minutes, it will take a few cycles to get clear fuel.
The attached image shows the bleed plug, I removed the yellow paint so it’s easier to see.
See the CAT C13 Operation and Maintenance Manual in coach assist, starting at page 105.
