Searched and researched to death. Bought older kubota m4500dt. S2600 inline 6 diesel idi. Brand new injectors, 2 month old glow plugs, motor brand new rebuilt, less than 1 hour runtime. Cold starts inside insulated but unheated garage at around 32 degrees. Cycle plugs until resistor is cherry, turn to start. It starts but runs rough with lots of sputter and white smoke. I even try to cycle plugs back on to smooth out a little. It helps minor. Once warm up in about 5 minutes runs smooth as silk with great power. Resistor is inline like it should be, gp are almost brand new. I get around 11v when resistor is on at the plugs. Any ideas? Seems like in32 degrees it should run a little better even dead cold. Being brand new motor and injectors.