I'm hoping you guys can help me.I have a 2004 xjr with 146,000 miles that I've owned for about a year. I'm seeing oil on top of the engine behind the intake where it looks like part of the supercharger connects .Where could oil be coming from to get there? the car was in the indy Jag shop about a month ago to have the intake manifold gasket replaced so all of that was taken apart to do that repair. Also my spark plugs are fouling and my throttle body sensor has gone bad .Could this oil leak have caused this issues as well ?