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You have trained unit to expect new things every few weeks. Truck is waiting with breathless anticipation for your new investment.
Anyway we must have fun.
It sounds like unit is getting air on return side of fuel system. Look very carefully at injector line fitting, return banjo ar rear and three way fuel line also at rear of engine. You are looking for very small fuel weep or wetness. To verify leak is issue park the unit downhill with full tank of fuel. It can pull air into lines after shutdown and cause issue with backpressure at overflow valve. In my case, 6 months earlier had installed injectors and everything fine. Started long crank from cut #2 connector O-ring. O-ring fixed mine.
Others have had issue on supply side after filter replace, LP replace and banjo gskts loose.
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