At the end of the fuel rail (alum tube) there is a plug, if this plug loses its seal it will leak fuel. Very Dangerous! Replace ASAP. I had this problem with my 95 960.

Perform the pcv glove test on your engine, engine off, remove the oil fill cap, place a latex glove over the inlet use a rubber band if needed, start engine look for the glove to blow up or collapse, if it blows up then your problem is the pcv system is clogged and your having pressure buildup in ...