Folks,

I am running WVO and after Idling for about 3 minutes, it would smoke on running again. I would Idle for 3 minutes and when I start to go, it smokes gray smoke. I understand this is due to incomplete combustion of the WVO fuel at idle. Is this correct? Why else would it smoke?

This does not appear to happen when I'm idling on B100.

I heard the LBZ would smoke after being idled for an extended period even when running Diesel. Does anyone know what causes this? Is this harmful? I am concerned that if it is due to incomplete combustion, I would be building up carbon buildup in my cylinders and valves.

I was thinking of increasing my Fuel Rail Pressure at idle to help avoid this. This is to improve atomization. Is this a good idea? What negative consequence is there for higher FRP at idle?

Raising the FRP is going to help atomization. Assuming your running heated WVO I doubt that you need better atomization, though. What fuel temp are you logging when this happens?

Raising the FRP is going to help atomization. Assuming your running heated WVO I doubt that you need better atomization, though. What fuel temp are you logging when this happens?

This happens during idle with WVO input at 160-170F and Fuel temp reading at Fuel rail at 150-160F.

Excessive rail pressure can result in a lopey idle

Increase the pilot injection pulse width ~5%-10% for the 1 mm3 - 5 mm3 range.