you can loosen one high pressure line at a time when the engine is running at the speed where it is not shaking. this is like shorting a spark plug on a gas engine to see which cylinder is not firing. if that makes no difference in operation , that is the one not firing. be careful because the high pressure fuel can give you blood poisoning if it penetrates your skin. i suspect one of the cylinders is not firing.
Liberals are people who care about others. Freethinkers are not constrained by the myths of religion.