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JWenig, already replaced all of the hoses to the selector valve and the o-rings in the valve. The hoses were pretty rough. I have not replaced the hose from the filter to the IP yet. How would the return line off of the engine draw in air? Isn't this line pressurized while the truck is running...

Does not smoke alot when running, just a little. Power is poor compared to my M813/super singles. No idea of fuel economy..... Wouldn't any air leaks have to be on the suction side of the injector pump? One thing to mention is that if I let the truck idle for 10 minutes or so, turn it off and...

I will double check that washer again but the engine had the issues when I got it and I changed the fuel filter first to eliminate that possibility. And yes, it does this on both tanks.

All, Has anyone ever put an electric lift pump on a five ton with a Cummins? Seems that I am drawing air in from somewhere and I cannot find it. I have even pressurized the entire fuel system including the tanks. All of the selector valve lines have been replaced that were in question. If my...