Can you describe your starting problems in detail?
Cold start issues?
Hot start issues?
How old is the gas in your rig?
When was the last time the fuel filter was changed?
2004 Chevrolet Silverado 3500 LT with a 2004 Jayco JayFlight 29BHS
2014 Greyhawk 31FS with a 2007 Tahoe toad
2014 Thor Palazzo 33.3 with a 2007 Tahoe toad