Jeff, sorry had another Jeff having same problem and sent information to that person thinking
I was sending to you. If you can have someone to assist, you can determine if your fuel system is
getting air into system by the use of a plastic line at hardware store 1/2 inch about 2 feet. The
next step under your bed on back of engine head right in the center you will see a hex fitting
Connect to a elbow on engine head. This hex fitting turns downward at a slight angle to to left
Looking to rear of motorhome. On this hex fitting there is a hose attached to the other end. Note:
This hex fitting is called your return fuel pressure regulator. Remove the hose on the downward
end on hex fitting and connect the plastic hose and put open end into a gallon container. Start
engine and watch the clear plastic hose real close. What you are looking for is presents of any
air bubbles in your fuel system while engine is running. This will confirm air within your fuel
system and engine surge. Where to look for air , connection fittings, water fuel filter connections.
This you will find where problem is located. Reconnect hose on rear on engine at hex fitting.
This the easy way to check your fuel system at this location and work back from here. This
information you can show someone that can help you. Dave Atherton Retired Cat Mechanic.