I know what you are saying about the cold veg oil - that is why I usually run 50/50 with diesel, which brings it's viscosity much closer to that of diesel. Apparently running 80/20 or 85/15 with petrol is best, as the petrol lowers the viscosity much better than diesel. I'm using misfuel at the moment which is half diesel, half petrol as it's free.
My plan long term is to either twin tank, or just to add a heat exchanger to heat the veg oil before it gets to the pump. I am also going to add a lift pump so the IP isn't working add hard to suck it from the tank.
That was also my thought that timing was not correct, but veg oil Burns slower than diesel, so normally you have to advance the timing. But rattles and diesel knock are symptoms of too much advance. Also this is only when cold. Past 1/3 temp it's fine.
I mentioned this rattling on the veg forum but was shot down for having the Monark nozzles which are not correct for this engine.
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