X15 2250SN fault code 1911

[Rawze]

Maybe also try pulling the manifold away from the head a bit by removing all (only) the manifold stand-off's from the bolts + loosen everything up a bit .. so that there is a tiny gap to the head ... and then crank it after letting it sit over night to cool off. See if one of the cylinders is spitting fuel (or oil) and wet stacking at first crank.